Question

according to the law of energy conservation, the total amount of energy is constant, then why does the chemical energy in electric cells got used up?

Answer 1

The law of conservation of energy states that energy can neither be created nor destroyed - only converted from one form of energy to another.

Step-by-step explanation:

This means that a system always has the same amount of energy unless it's added from the outside. is the total internal energy of a system.