One way our body is cooled is by evaporation of the water in sweat as shown. In very hot climates, we can lose as much as 1.5 L of sweat per day. Although sweat is not pure water, we can get an...

One way our body is cooled is by evaporation of the water in sweat as shown. In very hot climates, we can lose as much as 1.5 L of sweat per day. Although sweat is not pure water, we can get an approximate value of the amount of heat removed by evaporation by assuming that it is. How much heat is required to evaporate 1.5 L of water (1.5 kg) at
T
= 37 °C (normal body temperature);
ΔH_vap

= 43.46 kJ/mol at 37 °C.