Physical Chemistry
Physical Chemistry
3rd Edition
ISBN: 9780321812001
Author: ENGEL, Thomas/ Reid
Publisher: Pearson College Div
Question
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Chapter 5, Problem 5.23NP

(a)

Interpretation Introduction

Interpretation:

The value of ΔS at constant pressure needs to be determined when the temperature of 2.50 mol of an ideal gas having Cv=5/2R is increased from 160.

Concept Introduction :

The change in entropy for an ideal gas at constant pressure can be calculated as follows:

  ΔS = nCp,mlnTfTi

Here, ΔS = Change in entropy

n = number of moles

Cp,m = molar heal capacity at constant pressure

T = Temperature

(b)

Interpretation Introduction

Interpretation:

The value of ΔS at constant volume needs to be determined when the temperature of 2.50 mol of an ideal gas having Cv=5/2R is incremented from 160.

Concept Introduction :

The change in entropy can be represented as follows:

  ΔS = d q reversibleT

Here ΔS = Change in entropy

qreversible = reversible heat

T = Temperature

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