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Get Full Access to University Physics - 13 Edition - Chapter 20 - Problem 10dq
Get Full Access to University Physics - 13 Edition - Chapter 20 - Problem 10dq

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# Compare the pV-diagram for the Otto cycle in Fig. 20.6

ISBN: 9780321675460 31

## Solution for problem 10DQ Chapter 20

University Physics | 13th Edition

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University Physics | 13th Edition

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Problem 10DQ

Compare the ?pV?-diagram for the Otto cycle in Fig. 20.6 with the diagram for the Carnot heat engine in Fig. 20.13. Explain some of the important differences between the two cycles.

Step-by-Step Solution:

Solution 10DQ Step 1 of 2: Carnot Cycle Carnot cycle is a reversible cycle where a working fluid goes under a cycle with working process Isothermal heat addition, Isentropic expansion, Isothermal heat rejection and finally Isentropic compression. Carnot cycle has the most efficiency of all the working cycle present in the world because it's each process is nearly reversible. Heat Engines work on the Carnot Cycle while Refrigerator and Heat Pumps work on reversed Carnot engine. The carnot cycle thermal efficiency depends on only on T H and T C T ecornot= 1 T C H Step 1 of 2: Otto cycle Engines working on Otto and diesel cycle in an automobile although form in a cycle, are not reversible cycle as the working medium changes changes after each cycle. Otto and diesel are much similar to each other except the heat addition process. In otto heat addition is by constant volume process whereas in diesel the heat addition is by constant pressure process. These cycles are not as efficient as carnot cycle as process are not reversible. The otto cycle has has a theoretical maximum thermal efficiency e that depends on the compression ratio r and the ratio of heat capacities of the working substance e = 1 1 e1

Step 2 of 1

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