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Air is compressed from an initial condition of 1 bar and 25 °C to a final state of 5 bar and 25 °C by three different mechanically reversible processes in a closed system (a)Heating at constant volume followed by cooling at constant pressure. (b) Isothermal compression. (c)Adiabatic compression followed by cooling at constant volume. At these conditions, air may be considered an ideal gas with the constant heat capacities, Cv = (5/2)R and Cp = (7/2)R. Calculate the work required, heat transferred and the changes in internal energy and enthalpy of the air for each process.

Air is compressed from an initial condition of 1 bar and 25 °C to a final state of 5 bar and 25 °C by three different mechanically reversible processes in a closed system (a)Heating at constant volume followed by cooling at constant pressure. (b) Isothermal compression. (c)Adiabatic compression followed by cooling at constant volume. At these conditions, air may be considered an ideal gas with the constant heat capacities, Cv = (5/2)R and Cp = (7/2)R. Calculate the work required, heat transferred and the changes in internal energy and enthalpy of the air for each process.

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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Instructions: Show complete solution. Round everything to four decimal places and box all final answers. Solution should be handwritten. Provide solution in this format: Given, Required, Solution and Answer. Air is compressed from an initial condition of 1 bar and 25 °C to a final state of 5 bar and 25 °C by three different mechanically reversible processes in a closed system (a)Heating at constant volume followed by cooling at constant pressure. (b) Isothermal compression. (C)Adiabatic constant volume. compression followed by cooling at At these conditions, air may be considered an ideal gaswith the constant heat capacities, Cv = (5/2)R and Cp = (7/2)R. Calculate the work required, heat transferred and the changes in internal energy and enthalpy of the air for each process.
Transcribed Image Text:Instructions: Show complete solution. Round everything to four decimal places and box all final answers. Solution should be handwritten. Provide solution in this format: Given, Required, Solution and Answer. Air is compressed from an initial condition of 1 bar and 25 °C to a final state of 5 bar and 25 °C by three different mechanically reversible processes in a closed system (a)Heating at constant volume followed by cooling at constant pressure. (b) Isothermal compression. (C)Adiabatic constant volume. compression followed by cooling at At these conditions, air may be considered an ideal gaswith the constant heat capacities, Cv = (5/2)R and Cp = (7/2)R. Calculate the work required, heat transferred and the changes in internal energy and enthalpy of the air for each process.
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