What is kinetic energy and what role does it have in phase changes?

Explanation:

Kinetic energy is the energy obtained by an object because of its motion.

And, kinetic energy is directly related to temperature as follows.

                    K.E =

where,     k = Boltzmann constant

               T = temperature

As temperature is also a measure of average kinetic energy of particles. Therefore, when temperature is decreased then there will also occur a decrease in the kinetic energy of particles.

This will lead to change in phase of the substance as decrease in kinetic energy of particles of a liquid will change it into solid phase. And, an increase in kinetic energy of particles of a liquid will lead to change it into vapor state.

the answer is the first option

explanation:

just googled it m8. not that hard

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