Given the standard enthalpy changes for the following two reactions: (1) N2(g) + 2O2(g)N2O4(g)...... ΔH° = 9.2 kJ (2) 2N2O(g)2N2(g) + O2(g)......ΔH° = -164.2 kJ what is the standard enthalpy change for the reaction: (3) 2N2O(g) + 3O2(g)2N2O4(g)......ΔH° = ?

Principles of Modern Chemistry
8th Edition
ISBN:9781305079113
Author:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler
Publisher:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler
Chapter12: Thermodynamic Processes And Thermochemistry
Section: Chapter Questions
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Given the standard enthalpy changes for the following two reactions:

(1) N2(g) + 2O2(g)N2O4(g)...... ΔH° = 9.2 kJ

(2) 2N2O(g)2N2(g) + O2(g)......ΔH° = -164.2 kJ

what is the standard enthalpy change for the reaction:

(3) 2N2O(g) + 3O2(g)2N2O4(g)......ΔH° = ?

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