Q3) A piston-cylinder device contains 1.5 kg of nitrogen initially at 100 kPa and 17°C. The nitrogen is now compressed slowly in a polytropic process during which PV" = constant (1.1Sn$1.3 increment 0.02) until the volume is reduced by one-half. a) Determine the work done. Plot the variation of the boundary work with changing polytropic exponent and discuss the result. b) Determine the heat transfer for this process. Plot the variation of the heat transfer with changing polytropic exponent and discuss the result. c) Determine the entropy production. Plot the variation of the entropy production with changing polytropic exponent and discuss the result.
Q3) A piston-cylinder device contains 1.5 kg of nitrogen initially at 100 kPa and 17°C. The nitrogen is now compressed slowly in a polytropic process during which PV" = constant (1.1Sn$1.3 increment 0.02) until the volume is reduced by one-half. a) Determine the work done. Plot the variation of the boundary work with changing polytropic exponent and discuss the result. b) Determine the heat transfer for this process. Plot the variation of the heat transfer with changing polytropic exponent and discuss the result. c) Determine the entropy production. Plot the variation of the entropy production with changing polytropic exponent and discuss the result.
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:Q3) A piston-cylinder device contains 1.5 kg of nitrogen initially at 100 kPa and 17°C. The
nitrogen is now compressed slowly in a polytropic process during which PV" = constant
(1.1sn<1.3 increment 0.02) until the volume is reduced by one-half.
a) Determine the work done. Plot the variation of the boundary work with changing
polytropic exponent and discuss the result.
b) Determine the heat transfer for this process. Plot the variation of the heat transfer
with changing polytropic exponent and discuss the result.
c) Determine the entropy production. Plot the variation of the entropy production
with changing polytropic exponent and discuss the result.
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