Humidity Charts on Chemical Engineering related Questions and Answers

Question :   What is the enthalpy change of 15oC system if the heat capacity of air at 20oC is 10 J/oC and heat capacity of water vapor at 20oC is 20 J/oC, enthalpy of vaporization is 20 J, and the humidity is 50%? 1. 50 J 2. 60 J 3. 80 J 4. 110 J Answer :   4 - 110 J