Humidity Charts on Chemical Engineering related Questions and Answers

Question :   What is the enthalpy change of 20oC system if the heat capacity of air at 25oC is 5 J/oC and heat capacity of water vapor at 25oC is 10 J/oC, enthalpy of vaporization is 10 J, and the humidity is 20%? 1. 25 J 2. 37 J 3. 44 J 4. 51 J Answer :   2 - 37 J