Question

state 4 differences between physical and chemical change​

Answer 1

Answer:

physical change: 1there will be no irreversible change.

2 there will be no change in its molecular theory.

3 you will get the same substance.

4 example - ice melting into water.

chemical change: 1 there will be complete change in molecular theory.

2 it cannot be reversed.

3 you will not get the same substance.

4 example-cooking of food.

please follow

Answer 2

Answer:

PHYSICAL CHANGES

- The chemical composition of a substance does not change.

- Change is only in the state of matter and not in the chemical identity.

-Examples include- Vaporising of water and dissolution of sugar in water.

- Most changes are reversible.

- No new substances are formed. For example,

Ice → Water → Steam

CHEMICAL CHANGES

- The chemical composition of a substance changes.

- Change is in chemical identity, but may or may not be in the state of matter.

- Examples include- Rusting of Iron, cooking of food etc.

- Most changes are irreversible.

- New substances are formed.For example,

methane → carbon dioxide and water