Question

define chemical reaction and physical reaction

Answer 1

hey!!

In a chemical reaction, there is a change in the composition of the substances..

Ina physical change there is a difference in the appearance, smell, or simple display of a sample of matter without a change in composition.

hope this helps you ☺☺

Answer 2

"A physical change in a substance does not change what the substance is.In a chemical change where there is a chemical reaction, a new substance is formed and energy is either given off or absorbed."