On a particular hot day, the temperature is 40°C and the partial pressure of water vapor in the air is 38.8 mmHg. What is the relative humidity?
Relative Humidity= partialpressureofH2OsaturatedvaporpressureofH2O×100% S.v.p. of water at 40°c = 55.3 ⇒ Relative Humidity= 38.855.3×100% Relative Humidity= 70%
