Question

during the chemical reaction heat is always involved true or false with correct statement​

Answer 1

Answer:

A physical change in a substance doesn't 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.Physical changes can be reversed, chemical changes cannot be reversed with the substance changed back without extraordinary means, if at all. For example, a cup of water can be frozen when cooled and then can be returned to a liquid form when heated.\

Hence statement is true.

Explanation:

Answer 2

FALSE

RELEASING OF HEAT IS A INDICATION OF CHEMICAL REACTION BUT IT IS ALWAYS NOT NECESSARY THAT HEAT WOULD BE RELEASED

HOPE IT HELPS:-)