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An inventor has devised a complicated nonflow process in which 1 mol of air is the working fluid. The net effects of the process are claimed to be: • A change in state of the air from 250°C and 3 bar to 80°C and 1 bar • The production of 1,800 J of work The transfer of an undisclosed amount of heat to a heat reservoir at 30°C Determine whether the claimed performance of the process is consistent with the second law. 7 Assume that air is an ideal gas for which Cp = -R. 2

An inventor has devised a complicated nonflow process in which 1 mol of air is the working fluid. The net effects of the process are claimed to be: • A change in state of the air from 250°C and 3 bar to 80°C and 1 bar • The production of 1,800 J of work The transfer of an undisclosed amount of heat to a heat reservoir at 30°C Determine whether the claimed performance of the process is consistent with the second law. 7 Assume that air is an ideal gas for which Cp = -R. 2

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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An inventor has devised a complicated nonflow process in which 1 mol of air is the working fluid. The net effects of the process are claimed to be: • A change in state of the air from 250°C and 3 bar to 80°C and 1 bar • The production of 1,800 J of work • The transfer of an undisclosed amount of heat to a heat reservoir at 30°C Determine whether the claimed performance of the process is consistent with the second law. Assume that air is an ideal gas for which C₁ = R. Cp 7 2
Transcribed Image Text:An inventor has devised a complicated nonflow process in which 1 mol of air is the working fluid. The net effects of the process are claimed to be: • A change in state of the air from 250°C and 3 bar to 80°C and 1 bar • The production of 1,800 J of work • The transfer of an undisclosed amount of heat to a heat reservoir at 30°C Determine whether the claimed performance of the process is consistent with the second law. Assume that air is an ideal gas for which C₁ = R. Cp 7 2
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