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Enthalpy of air is 15 J and enthalpy of water vapor is 20 J, if the total enthalpy of the system is 25 J, what is the humidity of the system?(a) 10%(b) 50%(c) 100%(d) 200%The question was asked in an international level competition.I'd like to ask this question from Degrees of Freedom Analysis in Steady-State Process topic in chapter Humidity Charts & their Use, Analysis of the Degrees of Freedom in a Steady – State Process, Solving Material and Energy Balances Using Process and Unsteady State Material and Energy Balances of Basic Chemical Engineering

Answer»

Right answer is (B) 50%

Best EXPLANATION: 25 = 15 + 20*H, => H = 0.5, => H = 50%.



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