A heat engine made with an ideal gas with f = 5 degrees offreedom has 3 steps. Starting with a volume of 8 liters and apressure of 1.3 × 10^5 Pa, the gas is compressed adiabatically to avolume of 1 liter and a pressure P2. Next the gas expands atconstant pressure back to 8 liters, then the pressure drops atconstant volume back to 1.3×10^5 Pa.
Draw the cycle in a P −V diagram.
Calculate the pressure P2.
Calculate the efficiency of the engine.
Calculate the ratio Tmin/Tmax of minimum and maximumtemperatures during the cycle and compare the efficiency of thisengine to e(Carnot) of a Carnot engine operating with the samevalue of Tmin/Tmax.
