Question

Given the following phase change diagram, during point D, what is taking place for the temperature and heat energy?

Phase Change Diagram Diagram | Quizlet

a
Temperature is increasing as Heat energy remains constant.
b
Heat energy is increasing as temperature remains constant.
c
Heat energy and temperature remain the same.
d
Heat energy and temperature increase at a constant rate.

Answer 1

In phase change diagrams, there are specific points where the temperature remains constant while heat energy is added or removed. These are usually the points where phase changes occur, such as melting, boiling, or condensation.

If point D corresponds to a phase change (for example, melting or boiling), the correct answer would typically be:

**b**: Heat energy is increasing as temperature remains constant.

This indicates that during the phase change, the system is absorbing heat (or releasing heat) to change its state, but its temperature does not change.