A substance has a melting point of 80 °C. Which of the following is true for the substance?

It will also change from a liquid to a gas at 80 °C while the liquid loses energy.
It will also change from a liquid to a gas at 80 °C while the liquid gains energy.
It will also change from a liquid to a solid at 80 °C while the liquid gains energy.
It will also change from a liquid to a solid at 80 °C while the liquid loses energy.