Question

How is the kinetic energy of the particles that make up a substance different after is changes state

Answer 1

As an example, the kinetic energy of water increases as it goes from a solid to a gas. This is because the increase in the temperature of the water causes the particles of the water to move faster and faster. The kinetic energy of the water decreases as it goes from a gas to a solid. The decrease in temperature causes the particles of the water to slow down.