(a) When a 4.25-g sample of solid ammonium nitrate dissolvesin 60.0 g of water in a coffee-cup calorimeter (Figure5.18), the temperature drops from 22.0 to 16.9 °C. CalculateΔH (in kJ>mol NH4NO3) for the solution process:NH4NO31s2¡ NH4+1aq2 + NO3-1aq2Assume that the specific heat of the solution is the sameas that of pure water. (b) Is this process endothermic orexothermic?

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