All of the following involve the input of energy EXCEPT:
A)melting
B)evaporation
C)freezing
D)sublimation

Question

Quizplus · Accepted Answer

When a substance freezes, its temperature decreases and its particles slow down, releasing energy to its surroundings. This results in the formation of a solid. No input of energy is required, thus making it the correct answer.

The other choices (melting, evaporation, and sublimation) all involve an input of energy in order to occur. Melting requires energy to raise the temperature of a solid to its melting point, at which point it will become a liquid. Evaporation requires energy to break the intermolecular bonds holding a liquid together so that it can become a gas. Sublimation requires energy to break the intermolecular bonds of a solid so that it can directly become a gas without passing through the liquid phase.

All of the Following Involve the Input of Energy EXCEPT