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stonecoldgen
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Homework Statement
its part VI) of a big problem, where:
0.12 moles of argon (40) undergoes the cycle abca described in the graph. Process ab lies on a 540k isotherm.
In the previious 5 sub problems, i figured that:
Tc=270k
Qbc=670J (lost)
Qca=400J (added)
Wab=370J
Wabca=100J
The PV diagram has points a,b and c where:
a=(1.5X10-3, 3.6X105)
b=(3X10-3, 1.8X105)
c=(1.5X10-3, 1.8X105)
Homework Equations
Q=mc[itex]\Delta[/itex]T
[itex]\Delta[/itex]U=Q+W
[itex]\epsilon[/itex]=1-Qout/Qin=1-Tlow/Thigh
The Attempt at a Solution
So it's basically using Qabca to find the efficiecy. The thing is that I am not sure what to use for the Qs.