Suppose you have a gas that obeys the following modified van der Waals equation: P(V-nb)=nRT a)   In 1–2 sentences, provide a physical interpretation for this equation. HINT:  Compare this with the actual van der Waals equation. What does the missing term represent? b)   For a gas obeying this modified van der Waals equation, derive an expression for the work done by a reversible and isothermal change in volume.

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
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Suppose you have a gas that obeys the following modified van der Waals equation:

P(V-nb)=nRT

a)   In 1–2 sentences, provide a physical interpretation for this equation.

HINT:  Compare this with the actual van der Waals equation. What does the missing term represent?

b)   For a gas obeying this modified van der Waals equation, derive an expression for the work done by a reversible and isothermal change in volume.

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