Question

1. Explain the relationship between heat and
physical state of a substance.​

Answer 1

Answer:

When a substance is heated, it gains thermal energy. Therefore, its particles move faster and its temperature rises. When a substance is cooled, it loses thermal energy, which causes its particles to move more slowly and its temperature to drop.

Answer 2

Answer:

When heat is applied to a solid, the kinetic energy of the molecules increases. The additional energy allows the molecules to move more freely and spread out. The substance turns into the liquid state.