Question

The temperature remains constant during phase change because the increased kinetic energy is used to overcome the cohesive forces in the liquid.

(a) True

(b) False

This question was addressed to me in examination.

I would like to ask this question from Melting Point in chapter Criteria of Purity and Characterisation of Materials of Engineering Chemistry I

Answer 1

Right choice is (a) True

For explanation: The temperature remains constant during phase change because the increased kinetic energy is used to overcome the cohesive forces in the liquid. The heat is absorbed in changing from one state to another, so no temperature change occurs.