A piston-cylinder device initially contains steam at 3.5 MPa, superheated by 5°C. Now, steam loses heat to the surroundings and the piston moves down, hitting a set of stops, at which point the cylinder contains saturated liquid water. The cooling continues until the cylinder contains water at 200°C. Determine (a) the initial temperature, (b) the enthalpy change per unit mass of the steam by the time the piston first hits the stops, and (c) the final pressure and the quality (if mixture).
A piston-cylinder device initially contains steam at 3.5 MPa, superheated by 5°C. Now, steam loses heat to the surroundings and the piston moves down, hitting a set of stops, at which point the cylinder contains saturated liquid water. The cooling continues until the cylinder contains water at 200°C. Determine (a) the initial temperature, (b) the enthalpy change per unit mass of the steam by the time the piston first hits the stops, and (c) the final pressure and the quality (if mixture).
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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![Problem 3-64
A piston-cylinder device initially contains steam at 3.5 MPa, superheated by 5°C. Now, steam
loses heat to the surroundings and the piston moves down, hitting a set of stops, at which
point the cylinder contains saturated liquid water. The cooling continues until the cylinder
contains water at 200°C.
Determine (a) the initial temperature, (b) the enthalpy change per unit mass of the steam by
the time the piston first hits the stops, and (c) the final pressure and the quality (if mixture).
Steam
3.5 MPa
69 F Partly cloudy](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fd80e57fb-22ea-4031-985a-5281f12319eb%2Fd236affc-6229-45f8-89dd-f24c86639160%2F6r5t07dh_processed.jpeg&w=3840&q=75)
Transcribed Image Text:Problem 3-64
A piston-cylinder device initially contains steam at 3.5 MPa, superheated by 5°C. Now, steam
loses heat to the surroundings and the piston moves down, hitting a set of stops, at which
point the cylinder contains saturated liquid water. The cooling continues until the cylinder
contains water at 200°C.
Determine (a) the initial temperature, (b) the enthalpy change per unit mass of the steam by
the time the piston first hits the stops, and (c) the final pressure and the quality (if mixture).
Steam
3.5 MPa
69 F Partly cloudy
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