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Q.1. A piston-cylinder device contains 1 mole of air initially at 1 bar and 298.15 K. The air is compressed to 3.3 bar and 298.15 K by two different closed-system mechanically reversible processes: (a) Cooling at constant pressure followed by heating at constant volume. (b) Heating at constant volume followed by cooling at constant pressure. Determine (1) the W, Q, AU and AH of the air for each process and (2) the W, Q, AU and AH of the air for the two steps combined? Hints: - (1) Assume the air remains a gas for which PV/T C. (2) Vair.at i bar and 298.15 K = 0.02479 m3/mol. (3) Cy air = 20.785 and Cp air 29.1 J. mol-1. K-1 %3D

Q.1. A piston-cylinder device contains 1 mole of air initially at 1 bar and 298.15 K. The air is compressed to 3.3 bar and 298.15 K by two different closed-system mechanically reversible processes: (a) Cooling at constant pressure followed by heating at constant volume. (b) Heating at constant volume followed by cooling at constant pressure. Determine (1) the W, Q, AU and AH of the air for each process and (2) the W, Q, AU and AH of the air for the two steps combined? Hints: - (1) Assume the air remains a gas for which PV/T C. (2) Vair.at i bar and 298.15 K = 0.02479 m3/mol. (3) Cy air = 20.785 and Cp air 29.1 J. mol-1. K-1 %3D

Introduction to Chemical Engineering Thermodynamics
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
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Q.1. A piston-cylinder device contains 1 mole of air initially at 1 bar and 298.15 K. The air is compressed to 3.3 bar and 298.15 K by two different closed-system mechanically reversible processes: (a) Cooling at constant pressure followed by heating at constant volume. (b) Heating at constant volume followed by cooling at constant pressure. Determine (1) the W, Q, AU and AH of the air for each process and (2) the W, Q, AU and AH of the air for the two steps combined? Hints: (1) Assume the air remains a gas for which PV/T = C. (2) Vairat i bar and 298.15 K 0.02479 m2/mol. (3) Cy air = 20.785 and Cp air = 29.1 J. mol-1. K-1 %3!
Transcribed Image Text:Q.1. A piston-cylinder device contains 1 mole of air initially at 1 bar and 298.15 K. The air is compressed to 3.3 bar and 298.15 K by two different closed-system mechanically reversible processes: (a) Cooling at constant pressure followed by heating at constant volume. (b) Heating at constant volume followed by cooling at constant pressure. Determine (1) the W, Q, AU and AH of the air for each process and (2) the W, Q, AU and AH of the air for the two steps combined? Hints: (1) Assume the air remains a gas for which PV/T = C. (2) Vairat i bar and 298.15 K 0.02479 m2/mol. (3) Cy air = 20.785 and Cp air = 29.1 J. mol-1. K-1 %3!
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