A Levels Physics

Which row correctly states the characteristics of the process of evaporation?
requires
heat energy
occurs only at a
particular temperature
can cause a change
of temperature
A
D


Choice B is correct because: 

Evaporation requires heat energy for molecules to overcome intermolecular forces and transition from the liquid phase to the gas phase. 

Evaporation can occur at any temperature (although the rate of evaporation increases with temperature), so it does not occur only at a particular temperature. 

Evaporation can also cause a change in temperature, as the liquid left behind cools down due to the loss of its most energetic molecules.

Choice A is incorrect because: 

Evaporation does not occur only at a particular temperature and can also cause a change in temperature.

Choice C is incorrect because: 

Evaporation requires heat energy, does not occur only at a particular temperature, and can cause a change in temperature.

Choice D is incorrect because: 

Evaporation requires heat energy.

Phases of Matter | 2013 - M/J - 9702/11 | Q20