P.1 ((Application on Reversible process at Constant V and P) Air at 1 bar and 298.15 K (25 °C) is compressed to 5 bar and 298.15 K by two different mechanically reversible processes as follows: (a) Cooling at constant pressure followed by heating at constant volume. (b) Heating at constant volume followed by cooling at constant pressure. Calculate the heat and work requirements, AU, and AH of the air of each path. The following heat capacities for air may be assumed independent of temperature; C, = 20.78 and Cp = 29.10 J/mole K Assume also for air that PV/T is a constant, regardless of the changes it undergoes. At 298.15 K and 1 bar the molar volume of air is 0.02479 m/mole.
P.1 ((Application on Reversible process at Constant V and P) Air at 1 bar and 298.15 K (25 °C) is compressed to 5 bar and 298.15 K by two different mechanically reversible processes as follows: (a) Cooling at constant pressure followed by heating at constant volume. (b) Heating at constant volume followed by cooling at constant pressure. Calculate the heat and work requirements, AU, and AH of the air of each path. The following heat capacities for air may be assumed independent of temperature; C, = 20.78 and Cp = 29.10 J/mole K Assume also for air that PV/T is a constant, regardless of the changes it undergoes. At 298.15 K and 1 bar the molar volume of air is 0.02479 m/mole.
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:P.1 (Application on Reversible process at Constant V and P)
Air at 1 bar and 298.15 K (25 °C) is compressed to 5 bar and 298.15 K by two different mechanically
reversible processes as follows:
(a) Cooling at constant pressure followed by heating at constant volume.
(b) Heating at constant volume followed by cooling at constant pressure.
Calculate the heat and work requirements, 4U, and AH of the air of each path. The following heat
capacities for air may be assumed independent of temperature; C, = 20.78 and Cp = 29.10 J/mole K
Assume also for air that PV/T is a constant, regardless of the changes it undergoes. At 298.15 K and 1
bar the molar volume of air is 0.02479 m/mole.
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