Reversible Changes or Physical Changes Examples Reversible Changes (2022)

Reversible changes are changes that can be undone or reversed. Melting, freezing, boiling, evaporating, condensing, dissolving and also, changing the shape of a substance are examples of reversible changes.

Reversible Changes or Physical Changes Examples Reversible Changes (1)

What are reversible changes?

Reversible changes are changes that can be undone or reversed.

Give another name for reversible changes.

Physical changes

Why we call reversible changes, physical changes?

Reversible changes usually change the physical appearance of a substance. Therefore, reversible changes are also called physical changes.

Characteristics of a reversible change

  • A reversible change changes how a substance looks or feels (changing the physical appearance), and it is easy to turn it back again.
  • A reversible change may change the state of a substance such as, solid, liquid and gas.
  • However, a reversible change does not change the amount of matter in a substance.
  • Also, a reversible change doesn’t produce new substances.

E.g.– Water can change into ice. Ice can change into water. Here, only the state of the substance liquid water changes, but not the substance water.

Processes of reversible changes

Reversible changes fall under different processes. They are;

  • Melting
  • Freezing
  • Boiling
  • Evaporation
  • (Boiling and evaporation are the two types of vaporization)

  • Condensation
  • Sublimation
  • Dissolving
  • Changing the shape of a substance
  • Making mixtures
  • Magnetism
  • Crystallization

Now let’s see the examples of reversible changes or physical changes involved in these different processes.

Examples of reversible changes

Following are some of the reversible changes examples.

Melting

Example (1) – Melting chocolate

When chocolate is heated until it melts, the melted chocolate can be changed back into solid chocolate by cooling or freezing.


Reversible Changes or Physical Changes Examples Reversible Changes (2)

Reversible Changes or Physical Changes Examples Reversible Changes (3)

Reversible Changes or Physical Changes Examples Reversible Changes (4)

(Video) Reversible Changes or Physical Changes | Reversible Changes Examples | Physical Changes Examples

Example (2) – Melting candle wax

When candle wax is heated, the solid wax melts and becomes a liquid. If you cool the molten wax, it becomes a solid again.


Reversible Changes or Physical Changes Examples Reversible Changes (5)

Example (3) – Melting ice cubes

When you keep some cubes of ice outside the freezer for a few minutes, you can see how they melt and turn into liquid water.

Reversible Changes or Physical Changes Examples Reversible Changes (6)

If you pour this water in a tray of ice cubes and keep in the freezer for some time, you can make ice cubes back.

Example (4) – Melting butter

Heat some butter and see how it melts. Keep the melted butter back in the fridge and get solid butter back.


Reversible Changes or Physical Changes Examples Reversible Changes (7)

Reversible Changes or Physical Changes Examples Reversible Changes (8)

Example (5) – Melting metal

People cast metal into shapes by melting them into a liquid. Melted metal is poured into molds. As the metal cools, it solidifies. This is how people make metal objects with different shapes. Alluminium, iron, lead, copper, gold and silver are popular types of metal that are melted. Also, brass, bronze and steel are some examples of metal alloys created by melting metal.


Reversible Changes or Physical Changes Examples Reversible Changes (9)

Example (6) – Melting plastic

Plastic can also be melted and pour into different molds to get different shapes. After cooling down, you can get solid plastic back.

Freezing

Example (1) – Making ice lollies

When orange juice is frozen to make ice lollies, the ice lollies can be changed back into liquid orange juice by heating.


Reversible Changes or Physical Changes Examples Reversible Changes (10)

Reversible Changes or Physical Changes Examples Reversible Changes (11)

Example (2) – Making ice cubes

When we put some water in the freezer of a refrigerator it will turn into ice. If we then warm ice it melts and changes back into water.


Reversible Changes or Physical Changes Examples Reversible Changes (12)

Reversible Changes or Physical Changes Examples Reversible Changes (13)

Example (3) – Making jelly

(Video) Physical and Chemical Changes | Reversible & Irreversible Changes | Chemistry

You can freeze a mixture of liquid jelly and turn it into solid jelly. If you keep solid jelly outside the fridge for sometime you can get liquid jelly back.


Reversible Changes or Physical Changes Examples Reversible Changes (14)

Example (4) – Freezing lava

Lava is molten rock. Rock can be melted due to the extreme heat at the centre of the earth and turns into a liquid called ‘magma’. Magma gushes out of the earth’s weakest surfaces as a volcanic eruption. The runny magma that flows from the volcano is called ‘lava’. Lava that runs out of volcanoes cools down quickly.


Reversible Changes or Physical Changes Examples Reversible Changes (15)

Boiling, evaporating and condensing

You can boil some water and turn it into a gas, which is water vapour. We also call this ‘steam’. This process is called ‘evaporation’.

If you could capture all the steam that is made when a kettle boils, you could turn it back to water by letting it cool. This process is called ‘condensation’


Reversible Changes or Physical Changes Examples Reversible Changes (16)

Sublimation

Substances like iodine and dry ice can directly change to the gaseous state when they are heated. This process is called ‘sublimation’.

Example (1) – Heating iodine crystals

When solid iodine crystals are heated they directly form a purple gas without passing through a liquid state.


Reversible Changes or Physical Changes Examples Reversible Changes (17)

Example (2) – Heating dry ice

Dry ice is carbon dioxide in its solid form. It turns directly into a gas when heated, instead of melting into a liquid.


Reversible Changes or Physical Changes Examples Reversible Changes (18)

Dissolving

Example (1) – Salt solution

When salt is mixed with water it disappears because it dissolves in the water to make salty water. We call this salt solution. The salt in the solution can be recovered by boiling off the water.


Reversible Changes or Physical Changes Examples Reversible Changes (19)

Reversible Changes or Physical Changes Examples Reversible Changes (20)

Example (2) – Sugar solution

(Video) Reversible vs irreversible changes 🤔 | What's the difference? | Learn with examples

You can make a sugar solution by dissolving sugar crystals in water. When you heat the solution, the water in it will evaporate leaving behind the sugar.


Reversible Changes or Physical Changes Examples Reversible Changes (21)

Changing the shape of a substance

We know that physical changes are reversible. But not all of them. Some physical changes occurred by changing the shape of a substance are not reversible. Let’s see which are reversible and which are not.

Example (1) – Blowing up a balloon

When you blow up a balloon the shape of the balloon is changed. If you let the air inside the balloon go it will come back to its usual shape. This physical change is reversible.


Reversible Changes or Physical Changes Examples Reversible Changes (22)

Example (2) – Crumpling a piece of paper

When you crumple a piece of paper it will become creased and wrinkled. However, neither the amount of matter in the paper nor the material the paper is made is changed. This change is reversible.


Reversible Changes or Physical Changes Examples Reversible Changes (23)

Example (3) – Cutting, tearing and breaking substances

When you cut a piece of wood in half, you change its shape. But you do not alter the way the wood is made.

Similarly, when you cut, tear or break something you just alter its shape by dividing the substance into some parts. The amount of matter in the substance and the material which the substance is made are not changed.

These types of changes are physical changes which are not reversible.


Reversible Changes or Physical Changes Examples Reversible Changes (24)

Example (4) – Molding clay

When you mold some clay into a pot, the shape of clay is changed, but no new matter or material is formed. You can turn the pot back into the same chunk of clay before you bake it in the kiln. This physical change is reversible.


Reversible Changes or Physical Changes Examples Reversible Changes (25)

Example (5) – Sharpening a pencil

When you sharpen a pencil, you change the physical appearance or the shape of the pencil. Also, some amount of matter is separated from the pencil, but no matter or material of the pencil is chemically changed. This physical change is not reversible.


Reversible Changes or Physical Changes Examples Reversible Changes (26)

Example (6) – Stretching a rubber band

(Video) Changes Around Us Class 6 Science - Reversible and Irreversible Changes

When you stretch a rubber band, you alter its shape, but it is still made of rubber. When you let it go it will come back to its usual shape. This physical change is reversible.


Reversible Changes or Physical Changes Examples Reversible Changes (27)

Example (7) – Squashing a sponge

Similarly, when you squash a sponge, you alter its shape, but it is still made of sponge. When you let it go it will come back to its usual shape. This physical change is also reversible.


Reversible Changes or Physical Changes Examples Reversible Changes (28)

Making and separating mixtures

Example (1) – Sand and gravel mixture

A sand and gravel mixture consists of solid particles of different sizes. Sieving is the best method to separate mixtures like this.


Reversible Changes or Physical Changes Examples Reversible Changes (29)

Example (2) – Water and sand mixture

Filtering is used to separate mixtures like water and insoluble substances such as sand.


Reversible Changes or Physical Changes Examples Reversible Changes (30)

Example (3) – Sand and salt mixture

To separate a mixture of sand and salt, first the mixture should be mixed with water and then filtered, lastly evaporated.


Reversible Changes or Physical Changes Examples Reversible Changes (31)

What is happening in these steps? First the salt dissolves in the water, then sand filters off and lastly, water evaporates to leave the salt.


Reversible Changes or Physical Changes Examples Reversible Changes (32)

Magnetism & Crystallization

Magnetism and crystallization are some advanced processes of physical changes.

The process of magnetism is reversible, and no new materials are formed as it does not affect the chemical composition.

The type, shape and the size of crystals can be changed by heating, rolling or hammering. However, no new materials are formed.

Also, read the lesson ‘Irreversible Changes‘ and try Reversible Changes and Irreversible Changes quizzes and worksheets.

(Video) Irreversible changes

Written By : K8School

FAQs

What are 5 examples of reversible changes? ›

Processes such as melting, boiling, evaporation, freezing, condensation, dissolution are reversible changes. A few examples are melting of wax, freezing of ice, and boiling water which evaporates as steam and condenses back to water.

What are 10 examples of reversible changes? ›

Reversible Changes
  • Melting of ice.
  • Boiling of water.
  • Melting of wax.
  • Stretching of a rubber band.
  • Stretching of a spring.
  • Inflation of a ballon.
  • Ironing of clothes.
  • Folding of paper.
15 Jun 2018

What is an example of a reversible physical change? ›

The melted ice cube may be refrozen, so melting is a reversible physical change. Physical changes that involve a change of state are all reversible. Other changes of state include vaporization (liquid to gas), freezing (liquid to solid), and condensation (gas to liquid). Dissolving is also a reversible physical change.

What are 20 examples of physical changes? ›

The change which does not affect the internal or chemical properties of a system is called a physical change.
  • Boiling of water.
  • Melting of ice.
  • Conversion of water to vapour.
  • Tearing of paper.
  • Cutting a fruit.
  • Freezing of water.
  • Cutting of cloths.
  • Cutting a cake.
18 May 2019

What is a reversible change Class 6? ›

A reversible change is a change that can be undone or reversed. These changes are observed in the physical state, size and shape of the substance. A reversible change does not create a new material. Example - A blacksmith changes a piece of iron into different tools. For that, a piece of iron is heated to red hot.

What is a reversible change Class 7? ›

Reversible changes - When a change in a substance can be reversed by changing the conditions, it is said to be a reversible change. Example - Melting of ghee or wax. 2.

What is reversible change Class 5? ›

A reversible change is often a physical change that can be reversed. Few examples are melting of wax, freezing of ice, boiling water which evaporates as steam and condenses back to water.

What are 10 irreversible changes? ›

Some examples of irreversible changes are burning of paper, Burning of fuels (like Wood, Coal and LPG), Cooking of food, Rusting of iron , Grinding of wheat grains into flour, Baking of chapatti (roti), Growth of a plant, Formation of flower from bud, Falling of leaves from a tree, Ripening of fruits, Ageing of man and ...

What is reversible and irreversible change with example? ›

A new substance is formed. Dissolving, melting, and folding is examples of reversible change. The burning of a substance is an example of an irreversible change.

Are all physical changes reversible class 6? ›

Answer: No, there are some physical changes which are irreversible. For example, tearing of a paper.

What are reversible and irreversible changes Class 7? ›

1. Reversible Changes are those changes that can be reversed easily to form the 'original substance'. 1. Irreversible changes are those changes where materials cannot be changed back to its original form.

What is a physical change Class 6? ›

Properties such as shape, size, colour and state of a substance are called its physical properties. A change in which a substance undergoes a change in its physical properties is called a physical change. A physical change is generally reversible. In such a change no new substance is formed.

What are 30 examples of physical changes? ›

30 Examples of Physical and Chemical Changes
Physical ChangeChemical Change
1. Making salt from seawater1. Moldy bread
2. Shattered glass2. Burning wood
3. Tearing a newspaper3. Cooking food
4. Cutting meat, fruits, and vegetables4. Fossilization
26 more rows

Is melting ice cream a reversible change? ›

Melting of ice cream is a reversible change . Molten ice cream can be changed back to its solid form. Thus, melting is a reversible change.

Is cutting of paper irreversible? ›

Reversible are changes that can be taken back to their original state. In case of irreversible change, the changed substance cannot be send back to its original state. Here cutting of paper is an example of irreversible change.

Is burning of candle a reversible change? ›

When we light a candle, the wax starts melting along with evolution of gases. We cannot get back the original candle from the melted candle. Such kind of a change in which the substance cannot be brought back into its original form is called an irreversible change. Hence, burning a candle is an irreversible change.

Is freezing water reversible? ›

Irreversible changes are changes in substance that will have a permanent effect, and they cannot be reversed. Freezing of water is a reversible change because frozen water can be melted on heating.

Is Rising of Sun reversible change? ›

Answer: Rising and Setting of the Sun at a Given Place is a Periodic Cehang Undesirable Change Physical Change Reversible Change Concept: Concept of Physical Changes.

What are reversible materials? ›

1. Reversible Changes – This is when materials can be changed back to how they were before the reaction took place. E.g. When ice melts to form water. It could be frozen back to ice again.

Is sugar and water reversible or irreversible? ›

Dissolution of sugar in water is a physical change because it does not result in the formation of a new substance. It is a reversible change as sugar and water can be extracted back from the solution by the process of crystallization followed by evaporation.

Is breaking a pencil a reversible change? ›

Similarly, when you cut, tear or break something you just alter its shape by dividing the substance into some parts. The amount of matter in the substance and the material which the substance is made are not changed. These types of changes are physical changes which are not reversible.

Is making jelly a reversible change? ›

Well, what about setting jelly? Irreversible. Why? Because if you make jelly and it sets you can't get back to the solid lumps in the packet.

What is the 5 physical change? ›

Physical changes include transitions from one state to another, such as from solid to liquid or liquid to gas. Cutting, bending, dissolving, freezing, boiling, and melting are some of the processes that create physical changes.

What are the 20 examples of chemical changes? ›

  • burning of paper.
  • cooking of food.
  • burning of wood.
  • ripening of fruits.
  • rotting of fruits.
  • frying egg.
  • rusting of iron.
  • mixing acid and base.

What are 4 examples of physical changes? ›

Some common examples of physical changes are: melting, freezing, condensing, breaking, crushing, cutting, and bending. Some, but not all physical changes can be reversed. You could refreeze the water into ice, but you cannot put your hair back together if you don't like your haircut!

What are 5 examples of irreversible reactions? ›

Cooking, baking, frying, burning, mixing, rusting, heating are examples of irreversible changes.

What are irreversible changes class 6? ›

A change that can't be reversed or we can't get back to its original stage is called an irreversible change. For example, Raw egg to boiled egg, Batter to idli, milk to curd, etc. These changes can't be reversed.

Which is irreversible change? ›

A change is called irreversible if it cannot be changed back again. In an irreversible change, new materials are always formed.

What are reversible and irreversible changes give examples Class 6? ›

Answer: Reversible changes: Melting of wax and stretching of a rubber band. Irreversible changes: Burning of a paper and growth of plants.

Which can be both reversible and irreversible? ›

Rohan: Both physical and chemical changes are reversible. Sam: Both physical and chemical changes are irreversible. Tom: Physical changes are irreversible and chemical changes are reversible.

What is irreversible change class 7th? ›

Irreversible change : When a substance can not be brought back to its original state after a change, it is said to be an irreversible change. Example : Souring of milk.

Which of the following is a physical and reversible change? ›

The melting of ice to give water is a physical and reversible change.

What are the 6 types of changes? ›

Reorientation essentially involves changing the organization from the existing state to a desired futuristic state as an anticipatory measure and then dealing with the entire process of transition.
  • Planned Change. ...
  • Incremental Change. ...
  • Operational Change. ...
  • Strategic Change. ...
  • Directional Change. ...
  • Fundamental Change. ...
  • Total Change.

Are all the physical changes are reversible? ›

Physical changes in matter are reversible: An ice cube can melt into liquid water, and then the liquid water can be frozen back into an ice cube. Chemical changes, on the other hand, are not reversible: A log burned in a fire turns to ashes, but the ashes cannot be changed back into a log.

What is an example of a reversible chemical change? ›

The elongation of a spring or the folding of paper are two examples of reversible chemical changes.

Is boiling water reversible or irreversible? ›

The changes that can be reversed are called reversible changes. During the boiling of water, it converts to water vapours. It can be cooled again to get liquid water. So boiling of water is an example of reversible change.

Which of the following is an example of reversible process? ›

Examples of Reversible Processes

slow adiabatic compression or expansion of gases. electrolysis (with no resistance in the electrolyte) the frictionless motion of solids. slow isothermal compression or expansion of gases.

What is irreversible and reversible process 11? ›

A reversible process is the process where it never occurs; on the contrary the irreversible process is the one which can be said to be the natural process and cannot be reversed.

What are Class 7 physical and chemical changes? ›

Properties such as shape, size, colour, and state of a substance are called its physical properties. A change in which a substance undergoes a change in its chemical properties is called a chemical change. New substances are formed. For rusting, the presence of both oxygen and water (or water vapour) is essential.

Is physical change temporary? ›

A physical change is defined as a change in which no new substance is formed. A physical change is temporary because this change can be easily reversed by reversing the conditions. For example when ice is melted it gets converted into water by absorbing heat.

What is rusting of iron Class 7? ›

When an iron object is left in damp air (or water) for a considerable time, it gets covered with a red-brown flaky substance called rust. This is called rusting of iron.

Which change is easily reversible? ›

Physical change occurs when substance undergoes a change that does not change their chemical composition. So the process can be reversible.

What is reversible change Class 5? ›

A reversible change is often a physical change that can be reversed. Few examples are melting of wax, freezing of ice, boiling water which evaporates as steam and condenses back to water.

What is a reversible change Class 7? ›

Reversible changes - When a change in a substance can be reversed by changing the conditions, it is said to be a reversible change. Example - Melting of ghee or wax. 2.

What are reversible and irreversible changes give examples? ›

Therefore, examples of Irreversible changes are- the burning of wood and rusting of iron, and example of reversible changes are- the freezing of ice and the melting of wax.

What is an example of irreversible reaction? ›

Definition: Irreversible Reaction

An irreversible reaction is a reaction that proceeds in one direction only; the products do not react together to reform the reactants. An example of this is when the fuel in a Bunsen burner undergoes combustion. The fuel is often a mixture of propane and butane.

What is an example of a reversible chemical change? ›

The elongation of a spring or the folding of paper are two examples of reversible chemical changes.

Is cutting of paper reversible? ›

Reversible are changes that can be taken back to their original state. In case of irreversible change, the changed substance cannot be send back to its original state. Here cutting of paper is an example of irreversible change.

Is sugar and water reversible or irreversible? ›

Dissolution of sugar in water is a physical change because it does not result in the formation of a new substance. It is a reversible change as sugar and water can be extracted back from the solution by the process of crystallization followed by evaporation.

Is salt water reversible or irreversible? ›

Dissolution of sugar and salt into water is a reversible process because sugar and salt can be retrieved upon heating the solution, thus evaporating water and leaving sugar and salt behind. Q. Dissolution of salt in water is a reversible change.

What are 10 irreversible changes? ›

Some examples of irreversible changes are burning of paper, Burning of fuels (like Wood, Coal and LPG), Cooking of food, Rusting of iron , Grinding of wheat grains into flour, Baking of chapatti (roti), Growth of a plant, Formation of flower from bud, Falling of leaves from a tree, Ripening of fruits, Ageing of man and ...

Is breaking a pencil a reversible change? ›

Similarly, when you cut, tear or break something you just alter its shape by dividing the substance into some parts. The amount of matter in the substance and the material which the substance is made are not changed. These types of changes are physical changes which are not reversible.

Is making jelly a reversible change? ›

Well, what about setting jelly? Irreversible. Why? Because if you make jelly and it sets you can't get back to the solid lumps in the packet.

Is candle a reversible? ›

The burning of candle is an irreversible change as the burnt candle thread cannot be obtained. While the melting of the wax is a reversible change as the shape of the wax can be obtained by heating it.

Is Rising of Sun reversible change? ›

Answer: Rising and Setting of the Sun at a Given Place is a Periodic Cehang Undesirable Change Physical Change Reversible Change Concept: Concept of Physical Changes.

Is melting of wax a reversible change? ›

Melting of wax is a reversible process. Since upon cooling, it changes back to solid wax. Similarly, Solidification of melted wax can be reversed which is the melting of wax.

Videos

1. Examples of Physical Change | Reversible and Irreversible | Chemistry
(Enjoy Learning)
2. Chemical Reactions | Reversible and Irreversible Changes | Smithsonian
(Nehal Anbar)
3. REVERSIBLE AND IRREVERSIBLE CHANGES | PRIMARYSCIENCE #5
(Devita Idris)
4. GCSE Science Revision Chemistry "Reversible Reactions"
(Freesciencelessons)
5. Reversible and Irreversible Changes
(NBC News Learn)
6. Class 5 Science Topic : Reversible and Irreversible changes
(Mount Zion Matriculation Higher Secondary School)

Top Articles

You might also like

Latest Posts

Article information

Author: Zonia Mosciski DO

Last Updated: 11/06/2022

Views: 6207

Rating: 4 / 5 (51 voted)

Reviews: 90% of readers found this page helpful

Author information

Name: Zonia Mosciski DO

Birthday: 1996-05-16

Address: Suite 228 919 Deana Ford, Lake Meridithberg, NE 60017-4257

Phone: +2613987384138

Job: Chief Retail Officer

Hobby: Tai chi, Dowsing, Poi, Letterboxing, Watching movies, Video gaming, Singing

Introduction: My name is Zonia Mosciski DO, I am a enchanting, joyous, lovely, successful, hilarious, tender, outstanding person who loves writing and wants to share my knowledge and understanding with you.