Complete Analysis of Heat Engine Goal Solve for the efficiency of a heat engine using a five-step process the includes: 1. Making a state table. P 2. Making a process table. 3. Calculating the totals for Work, Heat, and Internal-Energy-Change. 4. Identifying the heat input (hot reservoir) and output (cold reservoir). isothermal 5. Calculating the efficiency of the engine. Problem Shown in the figure to the right is a cyclic process undergone by a heat engine. Your heat engine shall use 3.0 moles of nitrogen gas a C (diatomic). During the process a->b, the pressure rises by a factor of 2.0. V T, = 300 K P. = 100,000 Pa Engine Cycle Solution (1) Fill in the State Table (all pressures in Pascals, all Pressure Volume Temperature volumes in cubic meters, all temperatures in K). Work Heat du a >b (2) Fill in the Process Table (all entries in Joules). b- >c C- >a Work = (3) Find the Totals: Heat = du = (4) Find the heat input (from "hot reservoir") and Q-hot = the heat output (to "cold reservoir"): Q-cold = (5) Find the efficiency of the engine: efficiency = 9.49 X %