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Statement of a problem № 2726

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Outside air at 5 °C and 20 percent relative humidity is introduced into a heating and air con ditioning plant where it is heated to 20 °C and its relative humidity is increased to a comfortable 50 percent. How many grams of water must be evaporated into a cubic meter of outside air to accomplish this? Saturated air at 5 °C contains 6.8 g/m3 of water, and at 20 °C it contains 17.3 g/m3.

Solution:
Outside air at 5 °C and 20 percent relative humidity is introduced into a heati

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