An ideal gas initially at 600 K and 10 bar undergoes a four-step mechanically revers- ible cycle in a closed system. In step 12, pressure decreases isothermally to 3 bar; in step 23, pressure decreases at constant volume to 2 bar; in step 34, volume decreases at constant pressure; and in step 41, the gas returns adiabatically to its initial state. Take Cp = (7/2)R and Cy= (5/2)R. (a) Sketch the cycle on a PV diagram. (b) Determine (where unknown) both T and P for states 1, 2, 3, and 4. (c) Calculate Q, W, AU, and AH for each step of the cycle.
An ideal gas initially at 600 K and 10 bar undergoes a four-step mechanically revers- ible cycle in a closed system. In step 12, pressure decreases isothermally to 3 bar; in step 23, pressure decreases at constant volume to 2 bar; in step 34, volume decreases at constant pressure; and in step 41, the gas returns adiabatically to its initial state. Take Cp = (7/2)R and Cy= (5/2)R. (a) Sketch the cycle on a PV diagram. (b) Determine (where unknown) both T and P for states 1, 2, 3, and 4. (c) Calculate Q, W, AU, and AH for each step of the cycle.
Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Chapter1: Introduction
Section: Chapter Questions
Problem 1.1P
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Transcribed Image Text:3.19. An ideal gas initially at 600 K and 10 bar undergoes a four-step mechanically revers-
ible cycle in a closed system. In step 12, pressure decreases isothermally to 3 bar; in
step 23, pressure decreases at constant volume to 2 bar; in step 34, volume decreases
at constant pressure; and in step 41, the gas returns adiabatically to its initial state.
Take Cp = (7/2)R and Cy= (5/2)R.
(a) Sketch the cycle on a PV diagram.
(b) Determine (where unknown) both T and P for states 1, 2, 3, and 4.
(c) Calculate Q, W, AU, and AH for each step of the cycle.
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