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1) A certain reaction has Delta H= -19.5 kJ and delta S= +42.7kJ. Caculate Delta G for the reaction at 25 degrees C. Is the reaction spontaneous at 25C?

2) Consider a reaction with Delta H= 15kJ and Delta S= 50k/J. Is the reaction spontatneous (a) at 10 degrees C; (b) at 80 degrees C.

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