When 4.44 g of solid NH4NO3 dissolves in 50.0 g of water at 27.2°C in a calorimeter, the temperature decreases to 20.9°C. The value of q for this reaction is 1.43 kJ. Calculate the enthalpy of solution (ΔH for the dissolution) in kilojoules per mole of NH4NO3 under the given conditions. (Assume that the specific heat of the aqueous solution is the same as water, 4.180 J/g·°C, and not sensitive to temperature over the temperature range.)