When a liquid freezes and then melts the steps are exothermic?

Generally, a liquid freezes exothermally on cooling and a crystal melts endothermally on heating.

The 6 phase changes are vaporization, condensation, freezing, melting, sublimation, and deposition

Ans. : frostbite is when exposure to cold temperatures causes freezing to the skin or other tissues. it most commonly affects the hands, feet, and face. the longer areas are exposed to cold, typically the worse the frostbite. the water temperature used for rewarming a frostbitten part should be : (102 -105) f degrees.