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28 Apr 2020
(a) When a 4.25-g sample of solid ammonium nitrate dissolves in 60.0 g of water in a coffee-cup calorimeter (Figure 5.17), the temperature drops from 22.0 to 16.9 °C. Calculate ∆H (in kJ/mol NH4NO3) for the solution process:
NH4NO3(s) 
NH4+(aq) + NO3–(aq)
Assume that the specific heat of the solution is the same as that of pure water. (b) Is this process endothermic or exothermic?
(a) When a 4.25-g sample of solid ammonium nitrate dissolves in 60.0 g of water in a coffee-cup calorimeter (Figure 5.17), the temperature drops from 22.0 to 16.9 °C. Calculate ∆H (in kJ/mol NH4NO3) for the solution process:
NH4NO3(s) NH4+(aq) + NO3–(aq)
Assume that the specific heat of the solution is the same as that of pure water. (b) Is this process endothermic or exothermic?
Collen VonLv2
28 May 2020
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