One kg of air initially at 7 bar pressure and 360 k temperature expands poly tropically (pvL2 = const.) until the pressure reduced to 1.4 bar. Determine: a)Final specific volume and temperature b)Change of internal energy c)Work done and heat interaction. d)Change in entropy.

Refrigeration and Air Conditioning Technology (MindTap Course List)
8th Edition
ISBN:9781305578296
Author:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson
Publisher:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson
Chapter2: Matter And Energy
Section: Chapter Questions
Problem 29RQ: If 3000 ft3 of air is crossing an evaporator coil and iscooled from 75F to 55F, what would be the...
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One kg of air initially at 7 bar pressure and 360 k temperature expands poly tropically (pvL2 = const.) until the pressure reduced to 1.4 bar. Determine:

a)Final specific volume and temperature

b)Change of internal energy

c)Work done and heat interaction.

d)Change in entropy.

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