Answer
Option-a
Work is done by the system.
Work Step by Step
During an isothermal expansion, the gas expands against an external pressure, which means work is done by the system on the surroundings.
College Physics (7th Edition)
by Wilson, Jerry D.; Buffa, Anthony J.; Lou, Bo
Published by
Pearson
ISBN 10:
0-32160-183-1
ISBN 13:
978-0-32160-183-4
Chapter 12 - Thermodynamics - Learning Path Questions and Exercises - Multiple Choice Questions - Page 448: 7
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