Question

Differentiate between the following terms
1. Physical changes and Chemical changes.
2. Adhesive force and Cohesive force.

Answer 1

Physical changes and Chemical changes.

Physical changes only change the appearance of a substance, not its chemical composition. Chemical changes cause a substance to change into an entirely substance with a new chemical formula. Chemical changes are also known as chemical reactions.

Adhesive force and Cohesive force.

Attractive forces between molecules of the same type are called cohesive forces. Attractive forces between molecules of different types are called adhesive forces.

Answer 2

Answer:

physical change                                                   chemical change

no new substances are made.           one or more new substances are formed  

energy is not always given out or taken in. energy is always give out or taken

it can be reversed.                                           in.

                                                                      it is usually very difficult to reverse.

Explanation: