Which of the following reactions will NOT be spontaneous at any temperature?          (A) 2SO3(g)   -->  2SO2(g)  +  O2(g);         DHo =  +198 kJ         (B) 2NO(g)  +  O2(g)  -->  2NO2(g);          DHo =  -112 kJ         (C) C2H4(g) +  H2(g) -->   C2H6(g);             DHo =  -137 kJ         (D) 2N2(g)  +  O2(g)  -->   2N2O(g);           DHo =  +164 kJ

Chemistry: Principles and Practice
3rd Edition
ISBN:9780534420123
Author:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward Mercer
Publisher:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward Mercer
Chapter17: Chemcial Thermodynamics
Section: Chapter Questions
Problem 17.78QE
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Which of the following reactions will NOT be spontaneous at any temperature? 

        (A) 2SO3(g)   -->  2SO2(g)  +  O2(g);         DHo =  +198 kJ

        (B) 2NO(g)  +  O2(g)  -->  2NO2(g);          DHo =  -112 kJ

        (C) C2H4(g) +  H2(g) -->   C2H6(g);             DHo =  -137 kJ

        (D) 2N2(g)  +  O2(g)  -->   2N2O(g);           DHo =  +164 kJ

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