Question

Which of the following generalizations cannot be made about the phase change of a pure substance from solid to liquid?

• A. It involves a change in potential energy.
• B. It involves no change in temperature.
• C. It involves a change in kinetic energy.
• D. It involves a change in entropy.

Answer 1

Answer: (C)

It involves a change in kinetic energy.

When a pure substance undergoes a phase change from solid to liquid state,there will increases in temperature so,the collision rate do not increases which implies that there is no change in kinetic energy,the entire heat involves a change in potential energy.It involves change in entropy because more free particles are generated from solid to liquid.