1. The problem statement, all variables and given/known data A heat engine operating between 78.5oC and 204oC achieves 20.6% of the maximum possible efficiency. What energy input will enable the engine to perform 10.2 kJ of work? The only help I need with this is exactly what equation(s) to use. I would think thermal efficiency would be one equation(e=W/Qh) but not sure what else to use.