Question

different between physical and chemical change with reference to the change in composition of the substance and change in energy ​

Answer 1

Answer:

1)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.

2)physical changes do not involve the production of energy.

Chemical changes usually involve the production of energy

Answer 2

Answer:

1. Physical changes only change the appearance of a substance not its chemical composition

chemical changes cause a substance to change into an entirely substance

2. physical changes do not involve the production of energy.

chemical changes usually involved the production of energy.