When 3.02 g of NH4Cl  is dissolved in enough water to make 20.05 mL of solution, the temperature dropped from 19.8°C to 9.1°C.  Calculate the enthalpy change (in kJ) when 1 mole of NH4Cl is dissolved in water.  The density and specific heat of water are 1.00 g/mL and 4.18 J/g°C respectively.

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