LIFE SCIENCE

Detailed explanation-1: -The change of a substance from its liquid state to its gaseous state at any temperature below its boiling point is called evaporation. During the process of evaporation, the liquids absorb heat from the surroundings which cause a cooling effect.

Detailed explanation-2: -For water molecules to go from a liquid to an energized gaseous state, they must first absorb heat energy. They do this by colliding with other water molecules. Evaporation is called a “cooling process” because it removes heat from the surrounding air.

Detailed explanation-3: -When 1 mol of water at 100°C and 1 atm pressure is converted to 1 mol of water vapor at 100°C, 40.7 kJ of heat are absorbed from the surroundings.