Question

true or false:
The material is converted from phase to phase at a constant temperature

Answer 1

Solution:

Ans: True.

Reason:

Temperature doesn't change as heat is added during a phase change; for example, when the ice melts. During the phase change, the added heat doesn't make the molecules move faster, but rather further apart. The heat energy added during the phase change is used to overcome some of the forces that hold the molecules together, allowing them to move further away from each other. During the phase change, the added heat energy is stored as potential energy, or energy of position, as the molecules are now further apart.