7:23 PExercise 3A heat engine exhausts its heat at 340 °C and has a Carnot efficiency of 38% What exhaust temperature would enable it to achieve a Carnot efficiencyof 45 %.Exercise 4A Carnot cycle, shown in Fig. (3) has the following condilions: V, = 7.5 L,V, = 15 L, TH = 470 °C, and T, = 260 °C. The gas used in the cycle is 0.50mol of a diatomic gas, y = 1.4. Calculate (a) the pressures at a and b; (b)The volumes at c and d. (c) What is the work done along process ab? (d)What is the heat lost along process ed? (d) Calculate the net work done forthe whole cycle. (e) What is the efficiency of the cycle, using the definitione = W/QH? Show that this is the same as given by e = 1- .Exercise 5One mole of monatomic gas undergoes a Carnot cycle with TH = 350 °C andT = 260 °C. The initial pressure is 8.8 atm. During the isothermal expan-sion, the volume doubles. (a) Find the values of the pressure and volumeat the points a, b, c and d (see Fig. (3)). (b) Determine Q, W and AEntTHdFigure 3: Carnot CycleFor each segment of the cycle. (c) Calculate the efficiency of the cycle usinge = 1- , and e = 1 - .Exercise 6The PV diagram shown in Fig. (4)) applies to 2.1 moles of an ideal diatomicgas. (a) calculate the temperature at all points. (b) calculate the heattransferred in path AB, BC, CD and DA. (c) Determine the net heatabsorbs by the systems. (d) The net work done by the gas and the change ininternal energy for the complete cycle. Determine the total heat input QHand the total heat exhausted Q, during the cycle. (e) What is the efficiencyof this cycle?P(atm)B401050V (L)Figure 4: Exercice 6Exercise 73

Exercise 3 Given Data: The sink temperature in first case is T1 = 340 oC The efficiency in first…

Answered: Exercise 3 A heat engine exhausts its…

Exercise 3 A heat engine exhausts its heat at 340 °C and has a Carnot efficiency of 38 % What exhaust temperature would enable it to achieve a Carnot efficiency of 45 %.

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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