Evaporating sweat cools the body because evaporation is an endothermic process: h2o(l)→h2o(g)δh∘rxn= 44.01kj estimate the mass of water that must evaporate from the skin to cool the body by 0.55 ∘c . assume a body mass of 90 kg and assume that the specific heat capacity of the body is 4.0 j/g⋅∘c .