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2.11 One kg of steam in a piston/cylinder device undergoes the culate Q andW for each step. (a) Initially at 350 kPa and 250°C, it is cooled at constant pressure to 150°C. (b) Initially at 350 kPa and 250°C, it is cooled at constant volume to 150°C.

2.11 One kg of steam in a piston/cylinder device undergoes the culate Q andW for each step. (a) Initially at 350 kPa and 250°C, it is cooled at constant pressure to 150°C. (b) Initially at 350 kPa and 250°C, it is cooled at constant volume to 150°C.

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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Answers are a) 50.2 kj/kg for W and Q is 210.2 Kj/kg 

B) Q is -155.45 kj/kg 

Can you please explain how we got these answer 

 
2.11 One kg of steam in a piston/cylinder device undergoes the following changes of state. Cal- culate Q and W for each step. (a) Initially at 350 kPa and 250°C, it is cooled at constant pressure to 150°C. (b) Initially at 350 kPa and 250°C, it is cooled at constant volume to 150°C. ond reversibly com-
Transcribed Image Text:2.11 One kg of steam in a piston/cylinder device undergoes the following changes of state. Cal- culate Q and W for each step. (a) Initially at 350 kPa and 250°C, it is cooled at constant pressure to 150°C. (b) Initially at 350 kPa and 250°C, it is cooled at constant volume to 150°C. ond reversibly com-
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m=1 kg=1000 g

 

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