How many kilograms of water must evaporate from a 600 kg wom

How many kilograms of water must evaporate from a 60.0 kg woman to lower her body temperature by 0.740 degree C? Is this a reasonable amount of water to evaporate in the form of perspiration, assuming the relative humidity of surrounding air is low? Yes No

Solution

According to the given problem,

a)For human body c=3470 J/kg.

At 37.0ºC the latent heat of vaporization L_v for water is 2430 kJ/kg or 580 kcal/kg

m*c*t= m_cond*L_v

m_cond = m*c*t/L_v

= 60•3470•0.75/2430000

= 6.43•10² kg

b) yes