Use the calorimetry equation to find the heat involved
Calculating the change in enthalpy for 1 mole ( MM of NH4NO3 is 80 g/mol)
When a 4.25-g sample of solid ammonium nitrate dissolves in 60.0 g of water in a coffee-cup calorimeter, the temperature drops from 22.0 oC to 16.9 oC.
You may want to reference (Pages 179 - 183) Section 5.5 while completing this problem.
Assume that the specific heat of the solution is the same as that of pure water.
Calculate delta(H) (in kJ/mol NH4NO3) for the solution proces.
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