The last question РАThe figure shows a PV diagram similar to the cycle of a Dieselengine. It consists of two adiabatic steps (a→b) and (c→d), aconstant pressure step (b→c) and a constant volume step (d→a).We are interested in the efficiency, assuming the engine uses adiatomic (f = 5) ideal gas.a) For each of the four steps, state what type of process it is andthe sign (+,-,or 0) of the work W, the heat Q, and the internalenergy change AU.Туреsign of WStepa→bsign of AUsign of Qb→cc→dd→ab) Express the engine efficiency in terms of the heat input |Qin and the exhausted heat |Qout.c) What is the isobaric heat capacity of n mole of a diatomic ideal gas?d) Use your table to identify the steps where heat enters the engine and where heat is exhausted andcalculate the efficiency. Your result for the efficiency should only contain temperature differencesand numbers.adiabatadiabatda

The heat capacity ratio can be described as: γ=CpCv =7R/25R/2 =1.4

The figure shows a PV diagram similar to the cycle of a Diesel engine. It consists of two adiabatic steps (a→b) and (c→d), a constant pressure step (b→c) and a constant volume step (d-a). We are interested in the efficiency, assuming the engine uses a diatomic (f = 5) ideal gas. a) For each of the four steps, state what type of process it is and the sign (+,-,or 0) of the work W, the heat Q, and the internal energy change AU. Type Step a-b sign of W sign of AU sign of Q b→c c→d d➜a b) Express the engine efficiency in terms of the heat input |Qin and the exhausted heat Qout. c) What is the isobaric heat capacity of n mole of a diatomic ideal gas? d) Use your table to identify the steps where heat enters the engine and where heat is exhausted and calculate the efficiency. Your result for the efficiency should only contain temperature differences and numbers. b adiabat C adiabat d a V