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Atmosphric air at 40 F and 50% relative humidity enters the heating section of an airconditioning...

Atmosphric air at 40 F and 50% relative humidity enters the heating section of an airconditioning device at a volumetric flow rate of 100ft^3/min. Water vapor is added to the heated air to increase the relative humidity to 55%. The temperature after the heating section is 72F and the temperature at the exit is 74F. Using the appropriate fomulas:
a) determine the rate of the heat transfer in Btu/min.
b) determine the mass flow of water vapor in lbm/min.
Engineering   Mechanical-Engineering   
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The Solution for this question is in attached images. Here I convert some units from English to SI because the psychrometric chart is in SI units both the answer and necessary parts of calculations are in both units English As well as SI. Please Rate this solution and also u can ask if any query arises in your mind. Psychrometric chart is also attached here.

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