Humidity Charts on Chemical Engineering related Questions and Answers

Question :   What is the enthalpy change of 10oC system if the heat capacity of air at 20oC is 5 J/oC and heat capacity of water vapor at 20oC is 15 J/oC, enthalpy of vaporization is 10 J, and the humidity is 40%? 1. 58 J 2. 84 J 3. 114 J 4. 135 J Answer :   3 - 114 J