(a) Explanation The figure below shows the T − s diagram for Carnot cycle. Figure-(1) The process 1 − 2 is a isentropic compression process, 2 − 3 is an isothermal heat addition process, 3 − 4 is an isentropic expansion process and 4 − 1 is an isothermal heat rejection process. The net heat transfer for a cycle is equal to the net work transfer through it. The area of the T − s diagram gives net heat transfer hence net work transfer is the net area of the T − s diagram. Write the net work transfer per kg for the cycle. W n e t m = ( T 2 − T 1 ) ( Δ s ) W n e t = m ( T 2 − T 1 ) ( Δ s ) (I) Conclusion: Substitute 0.1 kg for m , 800 K for T 2 , 400 K for T 1 and 25 kJ / kg ⋅ K for Δ s in Equation (I) (b) To determine The thermal efficiency of the cycle.

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Chapter 6.13, Problem 30P

(a)

To determine

The net work developed per cycle in kJ.

(b)

To determine

The thermal efficiency of the cycle.

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Chapter 6.13, Problem 29P

Chapter 6.13, Problem 31P

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The net work developed per cycle in kJ .