Question

Container A contains 10.0 g of liquid isopropyl alcohol which has a latent heat of vaporization of 732 J/g. Container B contains 10.0 g of liquid ethanol which has a latent heat of vaporization of 841 J/g. Both containers are brought to their respective freezing points. Heat is then removed from both containers at the same rate. The container whose contents will freeze first is:

Answer 1

By definition, the latent heat associated with melting a solid or freezing a liquid is called the heat of fusion.

Container A has a latent heat of vaporization of 732 J/g.
Container B has a latent heat of vaporization of 841 J/g.

Latent heat of vaporization refers to the vaporizing a liquid or a solid or condensing a vapour.

This means that Container A boils first because it has lower latent heat of vaporization. 

As you heat a solid, turning it into a gas, the kinetic energy of the molecules are increased to a point where there are no forces of attraction between the molecules. Thus, Container B will freeze faster than Container A