Practice Problem 6

Calculate deltaH and deltaS   for the following reaction:

NH4NO3(s)  + H2O(l--->   NH4+ (aq) + NO3- (aq)

Use the results of this calculation to determine the value of deltaGo for this reaction at 25o C, and explain why NH4NO3 spontaneously dissolves is water at room temperature.


deltaHo = 28.05 kJ

deltaSo = 108.7 J/K

deltaGo = -4.4 kJ

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