In a coffee cup calorimeter, 1.60 g of NH4NO3 is mixed with 75.0 g of water at an initial temperature of 25.00 C. After dissolution of the salt, the final temperature of the calorimeter contents is 23.34 C. Assuming the solution has a heat capacity of 4.18 J C g and assuming no heat loss to the calorimeter, calculate the enthalpy change for the dissolution of NH4NO3 in units of kJ/mol? Atomic weights: N=14.01, H=1.0079, O=16.00
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