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.


Answer

deltaHo = 28.05 kJ

deltaSo = 108.7 J/K

deltaGo = -4.4 kJ

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