Question

Define the latent heat of vaporisation. Differentiate the process evaporation and boiling.

Answer 1

Explanation:

Latent heat of vapourisation is a physical property of a substance. When a material in liquid state is given energy, it changes its phase from liquid to vapour without change in temperature, the energy absorbed in the process is called latent heat of vaporization. The latent heat of vaporization of water is about 2260kJ/Kg which is equal to 40.8kJ/mol.

. different between evaporation and boiling

##Evaporation is a normal process that occurs when the liquid form changes into the gaseous form; while causing an increase in the pressure or temperature.

#Boiling is an unnatural process where the liquid gets heated up and vapourized due to continuous heating of the liquid.

##Evaporation usually occurs on the surface of the liquid being heated up.

#Boiling usually occurs on the entire mass of the liquid that gets heated up.

##Bubbling effect is not visible in Evaporation.

#Bubbling effect is visible during the process of Boiling.

##The process of Evaporation is usually a slow and carried out process when compared to Boiling.

#The process of Boiling is usually much quicker and the process happens quite rapidly as well

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