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0.0200 m3/mol of air at 10 bar (300 K) has expanded by reduction of pressure to 5 bar (300 K) by two mechanically reversible process – heating at constant pressure followed by cooling at constant volume. Calculate the heat and work requirements and ∆U and ∆H of the air for each path. Use the following heat capacities for air: CV = 20.78 J/mol·K and Cp = 29.10 J/mol·K. Assume also for air that PV/T is constant, regardless of the changes it undergoes.

0.0200 m3/mol of air at 10 bar (300 K) has expanded by reduction of pressure to 5 bar (300 K) by two mechanically reversible process – heating at constant pressure followed by cooling at constant volume. Calculate the heat and work requirements and ∆U and ∆H of the air for each path. Use the following heat capacities for air: CV = 20.78 J/mol·K and Cp = 29.10 J/mol·K. Assume also for air that PV/T is constant, regardless of the changes it undergoes.

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
Problem 1.1P
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(Express the Answer in J/mol)

Heat and Work, and Internal Energy and Enthalpy Changes in a Closed System

0.0200 m3/mol of air at 10 bar (300 K) has expanded by reduction of pressure to 5 bar (300 K) by two mechanically reversible process – heating at constant pressure followed by cooling at constant volume. Calculate the heat and work requirements and ∆U and ∆H of the air for each path. Use the following heat capacities for air: CV = 20.78 J/mol·K and Cp = 29.10 J/mol·K. Assume also for air that PV/T is constant, regardless of the changes it undergoes.

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