Air passes steadily through a device from 20 psia and

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Reference no: EM13580249

Air passes steadily through a device from 20 psia and 80°F to 40 psia. During the process a work input of 24.2 Btu/lb is required, and a heat loss of 7.0 Btu/lb occurs with the energy appearing in the atmosphere at 80°F. Determine

(a) the entropy change of the air, and

(b) the entropy change of the atmosphere, both in Btu/(lb)(°R).

Reference no: EM13580249

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