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## Homework Statement

A 1.00 mol sample of an ideal monatomic gas is taken through the cycle shown in the figure. The process A B is a reversible isothermal expansion where PA = 5.0 atm, PB = 3.0 atm, VA = 30.0 L, and VB = 50.0 L.

(a) Calculate the net work done by the gas.

(b) Calculate the energy added to the gas by the heat.

(c) Calculate the energy exhausted from the gas by heat.

(d) Calculate the efficiency of the cycle.

## Homework Equations

## The Attempt at a Solution

started by calculating tamp at point A using (pressureA*VolumeA)/number of moles*gas constant, that came to 1822.2K

then used work=nRT ln(VA/VB) think that came to -7.74kj

next step W2=PB(VB-VC) which i got 6.06kj as answer

so net work done 7.74-6.06=1.68

for the following parts used Q2=n(5/2)R(Tc-Tb) to show energy exhausted

and Q3=n(3/2)R(Tb-Tc) combined this with W1=Q1 to get energy added

at some point i have made an error please help