(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

The PV diagram below (I will describe it) shows a cycle for 4.87moels of an ideal gas. The path ab is along an isothermal line.

Pressure is in atm and volume in m^{3}

Point a: (.08, 6)

Point b: (.24,2)

Point c: (.08, 2)

Find the ideal and the actual efficiency of the cycle

2. Relevant equations

1atm=101,300Pa

PV=nRT

1-T_{L}/T_{H}=[itex]\epsilon[/itex]

[itex]\epsilon[/itex]_{actual}=W_{out}/Q_{in}

3. The attempt at a solution

First of all, convert the pressures in atm to Pascals, to make life easier.

The temperature at a and b is 1,200K, the temperature at c is 400K. (found with PV=nRT)

so i thought that plugging that into 1/T_{L}/T_{H}=[itex]\epsilon[/itex] would give me the ideal efficiency. I got 67%

However, I don't know how to get the actual efficiency. I don't know what Qin and Wout are exactly

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# Homework Help: PV Diagram Problem (ideal efficiency vs actual efficiency)

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