Question

1. what happens during the heat of fusion?

a. a liquid changes to a gas
b. a solid changes to a liquid
c. a gas changes to a liquid
d. a solid changes to a gas

Explanation:

The heat of fusion is the energy required for a solid - to - liquid phase change. During this process, a solid changes to a liquid. Option a describes vaporization, option c describes condensation, and option d describes sublimation.

Answer:

B. A solid changes to a liquid