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enthalpy change

enthalpy change

Chemistry
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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Ozone, O3(g)O3(g), is a form of elemental oxygen that is important in the absorption of ultraviolet radiation in the stratosphere. It decomposes to O2(g)O2(g) at room temperature and pressure according to the following reaction:
2O3(g)→3O2(g)ΔH=−284.6kJ2O3(g)→3O2(g)ΔH=−284.6kJ
 
 

Part A

What is the enthalpy change for this reaction per mole of O3(g)O3(g)?
Express your answer to four significant figures and include the appropriate units.
 
 
 
Which has the higher enthalpy under these conditions, 2 O3(g)O3(g) or 3 O2(g)O2(g)?
 
2 O3(g)O3(g) has the higher enthalpy
3 O2(g)O2(g) has the higher enthalpy
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-142.3 kJ is correct answer

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