The enthalpy of vaporization for water is 40.65 kJ mol -1 . As a design engineer for

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The enthalpy of vaporization for water is 40.65 kJ mol-1. As a design engineer for a project in a desert climate, you are exploring the option of using evaporative cooling.

(a) If the air has an average volumetric heat capacity of 0.00130 J cm-3 K-1, what is the minimum mass of water that would need to evaporate in order to cool a 5 m × 5 m room with a 3 m ceiling by 5°F using this method?

(b) Is this a spontaneous or nonspontaneous process?

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Chemistry For Engineering Students

ISBN: 9780357026991

4th Edition

Authors: Lawrence S. Brown, Tom Holme

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