D. The kinetic energy is greater after a substance changes from a
solid to a liquid
Explanation:
During a phase change from solid to liquid, the particles making up the mobile becomes more mobile and as a result there is an increase in kinetic energy of the system.
Kinetic energy is the energy accrued due to the motion of a body.
In a melting process where solids turn to liquid, there is an increase in kinetic energy.
When randomness of a system increase, kinetic energy also increases.
From liquid to gas and gas to plasma increases kinetic energy.
In the other way round, the kinetic energy reduces.
