Question

Define latent heat of vaporization.

Answer 1

Hint:Latent heat is defined as the energy to convert one’s state of a unit mass of a material which can either be solid, liquid or gas and vice-versa. There are three types of latent heats which are named as: latent heat of fusion; latent heat of vaporization and latent heat of sublimation. In the above question we are asked for vaporization.

Complete answer:
Latent heat is also defined as the work done to overcome the attractive forces that are holding the molecules together. The following are the types of latent heat:
-Latent heat of fusion associated with melting a solid or freezing a liquid.
-Latent heat of vaporization associated with vaporizing a liquid or condensing a vapor.
-Latent heat of sublimation associated with sublimation of ice.

Learning more about the latent heat of vaporization. It is defined as the heat required to change one mole of liquid at its boiling point under standard atmospheric pressure. The process where liquid material is converted to vapor, the energy absorbed by the material is known as heat of vaporization.Enthalpy of vaporization is also known as heat of vaporization is the amount of heat added to convert liquid to gas, also represented as,
$\mathrm{\Delta }{H}_{vap}=\mathrm{\Delta }{U}_{vap}+p\mathrm{\Delta }V$
Where $\mathrm{\Delta }{H}_{vap}$ is the heat of vaporization, $\mathrm{\Delta }{U}_{vap}$ is the change in internal energy, $p$ is the pressure and $\mathrm{\Delta }V$ is the change in volume.

Note:Latent heat is where temperature remains constant.Latent heat of vaporization of water is $22.5\times {10}^{5}jk{g}^{-1}$ (joules per kilogram). Latent heat plays an important role in thunderstorms and hurricanes as when the liquid condenses into clouds it releases latent heat into the atmosphere then this heat warms the new cloud droplet causing instability which leads to rain.