“The energy required to change a given quantity of liquid into a gas”; water has a highlatent heat of vaporisation since extra energy is required to break the hydrogen bonds
Efficient cooling technique in mammals (temperature regulation), sweat absorbs heat from the skin and turns it to water vapor (evaporation)
Cool leaves in transpiration , water in the mesophyll cell walls evaporates into leaf air spaces; change of state requires thermal energy which is taken from the leaf
