Question

A gas undergoes a thermodynamic cycle consisting of three processes:

A gas undergoes a thermodynamic cycle consisting of three processes:

Compression occurs in Process 1-2 with pV= constant. P₁=10⁵ Pa, V₁=1.5 m³, and V₂=0.4 m³. U₂-U₁=0

Process 2-3 is isobaric.

Process 3-1 is isochoric. U₃-U1=-3259 kJ

a. Sketch the cycle on a p-V diagram.

b. Calculate the heat transfer for Process 3-1.

c. Calculate the work for process 2-3.


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Answer #2

Unit kg of steam is heated reversibly at constant pressure of 2.5MPa, a temperature of Y 0C and dryness friction 0.80. Calculate the change in entropy (S) of the system.

Y=[250+(191/100)]=269.

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