For the reaction A + B ⇌ C + D, ΔH°= +40 kJ and ΔS°= +50 J/K. Therefore, the reaction at standard conditions is
A. spontaneous at temperatures less than 10 K.
B. spontaneous at temperatures greater than 800 K.
C. spontaneous only at temperatures between 10 K and 800 K.
D. spontaneous at all temperatures.
E. Nonspontaneous at all temperatures.
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