Question

What change causes a substance to change states of matter?

Answer 1

If the states of matter have changed such as from solid to liquid, you have to remove or add energy.

Answer 2

Answer: Option (A) is the correct answer.

Explanation:

It is known that kinetic energy is the energy obtained by an object due to its motion.

And, when we increase the temperature of a substance then there will occur an increase in the kinetic energy of its molecules.

Also,      K.E = $\frac{3}{2}kT$

So, kinetic energy is directly proportional to the temperature. As a result, on increasing the temperature more number of collisions will take place between the molecules.

Therefore, we can conclude that amount of kinetic energy in the substance’s particles changes its states of matter.