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Air in a piston-cylinder device is initially at 70°F and 5 atm in surroundings that are at 70°F and 1 atm. The piston, which weighs one pound, is initially locked in place. After the locks are removed, the piston moves to a new position. At the end of the process, the air in the piston-cylinder is at 70°F and 2 atm. Frictional effects are negligible. Is there heat transfer in this process? Explain why or why not.

Air in a piston-cylinder device is initially at 70°F and 5 atm in surroundings that are at 70°F and 1 atm. The piston, which weighs one pound, is initially locked in place. After the locks are removed, the piston moves to a new position. At the end of the process, the air in the piston-cylinder is at 70°F and 2 atm. Frictional effects are negligible. Is there heat transfer in this process? Explain why or why not.

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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1. Air in a piston-cylinder device is initially at 70°F and 5 atm in surroundings that are at 70°F and 1 atm. The piston, which weighs one pound, is initially locked in place. After the locks are removed, the piston moves to a new position. At the end of the process, the air in the piston-cylinder is at 70°F and 2 atm. Frictional effects are negligible. Is there heat transfer in this process? Explain why or why not.
Transcribed Image Text:1. Air in a piston-cylinder device is initially at 70°F and 5 atm in surroundings that are at 70°F and 1 atm. The piston, which weighs one pound, is initially locked in place. After the locks are removed, the piston moves to a new position. At the end of the process, the air in the piston-cylinder is at 70°F and 2 atm. Frictional effects are negligible. Is there heat transfer in this process? Explain why or why not.
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