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The conversion of oxygen into ozone in the upper atmosphere is as follow :  3232 O2(g) → O3(g), with ΔH298 = +143kJ at 298K. Cp(O2) = 29.355 J/Kmol;  Cp(O3) = 39.2 J/K   The enthalpy of formation at 200K is :  a. ΔH200 = -143 473J b. ΔH200 = -142 527J c. ΔH200 = +142 527J d. ΔH200 = +143 473J

The conversion of oxygen into ozone in the upper atmosphere is as follow :  3232 O2(g) → O3(g), with ΔH298 = +143kJ at 298K. Cp(O2) = 29.355 J/Kmol;  Cp(O3) = 39.2 J/K   The enthalpy of formation at 200K is :  a. ΔH200 = -143 473J b. ΔH200 = -142 527J c. ΔH200 = +142 527J d. ΔH200 = +143 473J

World of Chemistry, 3rd edition
World of Chemistry, 3rd edition
3rd Edition
ISBN:9781133109655
Author:Steven S. Zumdahl, Susan L. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan L. Zumdahl, Donald J. DeCoste
Chapter10: Energy
Section: Chapter Questions
Problem 13A
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The conversion of oxygen into ozone in the upper atmosphere is as follow : 

3232 O2(g) → O3(g), with ΔH298 = +143kJ at 298K.

Cp(O2) = 29.355 J/Kmol;  Cp(O3) = 39.2 J/K

 

The enthalpy of formation at 200K is : 

a.

ΔH200 = -143 473J

b.

ΔH200 = -142 527J

c.

ΔH200 = +142 527J

d.

ΔH200 = +143 473J

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