When 4.04 g of solid NH4NO3 dissolves in 50.0 g of water at 26.0°C in a calorimeter, the temperature decreases to 20.3°C. The value of q for this reaction is 1.29 kJ. Calculate the enthalpy of solution (ΔH for the dissolution) in kilojoules per mole of NH4NO3 under the given conditions.

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