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2. Air just saturated with water vapor at 15.5C and a total pressure of 1 bar is compressed reversibly and isothermally in a cylinder

2. Air just saturated with water vapor at 15.5C and a total pressure of 1 bar is compressed reversibly and isothermally in a cylinder to a total pressure of 2 bar. Assuming that the volume of any water present can be neglected, determine the change in entropy of the mixture per kg of dry air. (20)

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