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What is the specific humidity, if the mass of water is 15 g and mass of bone dry air is 25 g?

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What is the specific humidity, if the mass of water is 15 g and mass of bone dry air is 25 g?

(a) 10%

(b) 30%

(c) 40%

(d) 60%

I had been asked this question in final exam.

The origin of the question is Humidity (Psychrometric) Chart topic in section 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

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Correct choice is (d) 60%

Explanation: Specific humidity = 15/25*100 = 60%.

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