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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 20 J, what is the humidity of the system?(a) 25%(b) 50%(c) 75%(d) 100%I have been asked this question during an internship interview.Question is taken from Degrees of Freedom Analysis in Steady-State Process topic in division 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 (a) 25%

The best I can explain: 20 = 15 + 20*H, => H = 0.25 = 25%.



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