1. The problem statement, all variables and given/known data Is it possible to calculate the work done heat transfer, and efficiency of an object in a thermodynamic system, given the Temperature vs Entropy graph? Example: 2. Relevant equations ∆U=Q-W ∆S=dQ/T e=1-(Qc/Qh) e=W/Qh 3. The attempt at a solution Since this is a T vs S diagram,i can understand how the product(area) will be heat. Since it's a cyclic process, I can also understand how Q=W , since ∆U=0 Currently I'm thinking that the area inside the triangle will be W, which also corresponds to Q. However, I could barely find any documentation on this, which is why I wanted to confirm it. As for efficiency, we are given two equations: 1-(Qc/Qh) and W/Qh Would both of them be correct here, and would Qh and Qc be T2 and T1 respectively? Thanks!