Thermodynamics, Statistical Thermodynamics, & Kinetics
Thermodynamics, Statistical Thermodynamics, & Kinetics
3rd Edition
ISBN: 9780321766182
Author: Thomas Engel, Philip Reid
Publisher: Prentice Hall
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Chapter 4, Problem 4.11NP
Interpretation Introduction

Interpretation:

The standard enthalpy of formation at temperature of 240°C for the reaction:

  C(graphite) + H2O(g)  CO(g) + H2(g) , needs to be deduced

Concept Introduction:

The standard enthalpy change for a reaction ΔH0 is given in terms of the difference in the standard enthalpy of formation of the products and that of reactants.

i.e. ΔH0 = npΔHf0(products) - nrΔHf0(reactants)  ------(1)

np and nr are the number of moles of the products and reactants

The enthalpy of formation at temperature T is related to the standard enthalpy of formation at 298 K by the following equation:

  ΔHf0(T) = ΔHf0(298K) + 298T ΔCpdT ------(2)where ΔCp=Cp(products)Cp(reactants) i.e. the difference in the heatcapacities of the products and reactants

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Chapter 4 Solutions

Thermodynamics, Statistical Thermodynamics, & Kinetics

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