Example 3.5 If the processes of Ex. 3.4 are carried out irreversibly but so as to accomplish exactly the same changes of statethe same changes in P, T, Uig, and Hig then different values of Q and W result. Calculate Q and W if each step is carried out with a work efficiency of 80% Example 3.4 A gas in its ideal-gas state undergoes the following sequence of mechanically reversible processes in a closed system: (a) From an initial state of 70°C and 1 bar, it is compressed adiabatically to 150°C. (b) It is then cooled from 150 to 70°C at constant pressure. (c) Finally, it expands isothermally to its original state. Calculate W, Q, AUig, and AHig for each of the three processes and for the entire cycle. Take CV ig = 12.471 and CP ig = 20.785 J-mol-1-K-1. %D %3D

Example 3.5 If the processes of Ex. 3.4 are carried out irreversibly but so as to accomplish exactly the same changes of statethe same changes in P, T, Uig, and Hig then different values of Q and W result. Calculate Q and W if each step is carried out with a work efficiency of 80% Example 3.4 A gas in its ideal-gas state undergoes the following sequence of mechanically reversible processes in a closed system: (a) From an initial state of 70°C and 1 bar, it is compressed adiabatically to 150°C. (b) It is then cooled from 150 to 70°C at constant pressure. (c) Finally, it expands isothermally to its original state. Calculate W, Q, AUig, and AHig for each of the three processes and for the entire cycle. Take CV ig = 12.471 and CP ig = 20.785 J-mol-1-K-1. %D %3D

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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