1. The problem statement, all variables and given/known data In the thermodynamic cycle as shown, a) What is the direction that the cycle is executed-clockwise or anticlockwise? b) What is the work done? 2. Relevant equations First law of thermodynamics for a cycle E2-E1= Q-W= Tds-Pdv=0 3. The attempt at a solution a) I know that it should be clockwise because I read that when ∫Tds is positive, the cycle on a T-S diagram should be represented in the positive direction. However, I don't understand this completely. b) I know it is the area inside the semicircle, but I don't know how I'm going to integrate it.