Helium gas expands from 125 kPa, 350 K and 0.25 m3 to 100 kPa in a polytropic process with n = 1.667. Is the work positive, negative or zero? Discuss.

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Helium gas expands from 125 kPa, 350 K and 0.25 m3 to 100 kPa in a polytropic process with n = 1.667. Is the work positive, negative or zero? Discuss.
Related Book For answer-question

Fundamentals of Thermodynamics

6th edition

Authors: Richard E. Sonntag, Claus Borgnakke, Gordon J. Van Wylen

ISBN: 978-0471152323