Question

what is the difference between physical and chemical changes ?
does anyone know the answer?

Answer 1

Answer:

PHYSICAL CHANGES MEANS No new thing is develop..Ex:-Ice

CHEMICAL CHANGES MEANS New thing is develop..Ex:-Paper.

Answer 2

Answer:

1. In a physical change, the molecules are rearranged while their actual                   composition remains same.

In a chemical change, the molecular composition of a substance completely changes and a new substance is formed.

2.Physical change is easily reversible i.e original substance can be recovered.

Chemical change is irreversible i.e. original substance cannot be recovered.

3.In physical change, no new substance is formed.

A chemical change is always accompanied by one or more new substance(s).

4.Physical change is a temporary change.

Chemical change is a permanent change.

5.In a physical change, no energy is produced.

In a chemical change, energy is produced

Explanation: