1. The problem statement, all variables and given/known data What is the thermal efficiency of an engine that operates by taking n moles of diatomic ideal gas through the cycle 1 -------> 2 -------> 3 -------> 4 ------> 1 shown in the figure ? http://s3.amazonaws.com/answer-board-image/2d50cb1e-1bc6-4325-acf6-fe1df4f0a7b5.jpeg 2. Relevant equations e = W/Qh 3. The attempt at a solution I know the answer is 10.5 I am trying to prep for a test today and this is the last thing from my homework that I don't understand....can someone explain to me how the answer is generated? I am sort of lost on it and I figure it has to be easier than it seems.