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# 2. 0.5 moles of an ideal gas is initially at T, = 300 K in a...

## Question

###### 2. 0.5 moles of an ideal gas is initially at T, = 300 K in a...

2. 0.5 moles of an ideal gas is initially at T, = 300 K in a volume Va=0.8 L. This gas has a y value of 9/7. It is taken around the cycle as shown: (1) expanded isothermally to volume Vo = 1.6 L, from a to b. (2) expanded adiabatically to T. = 275 K, from b to c. 0.8L (3) compressed at constant pressure to T, = 235.74 K, from c to d. (4) compressed adiabatically back to the start, from d to a. For each process, calculate the following quantities: (i) the heat absorbed or rejected during each process, (ii) the work done during each process, (iii) the change in internal energy of the system during each process. 1.6L V a. a-b b. b c c. C-d d. da e. What net work is done? f. What is the efficiency of this engine?

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