Question

what is the value of lantent heat of vapourization of water​

Answer 1

It is expressed as kg/mol or kJ/kg. When a material in liquid state is given energy, it changes its phase from liquid to vapor; the energy absorbed in this process is called heat of vaporization. The heat of vaporization of water is about 2,260 kJ/kg, which is equal to 40.8 kJ/mol

Answer 2

Answer:

In talking about the heats involved in changing temperatures, one thing we’ve neglected is what happens when a material changes phase. We talked about the three phases – gas, liquid, and water. When a material changes from one phase to another, we call this a phase transition or change of phase. Changes from the solid to the liquid or from the liquid to the gaseous state and vice versa are called phase changes.

They always involve a transfer of heat, even though the temperature of the substance undergoing the phase change stays constant.