Calorimetry (Section)(a) When a 4.25-g sample of solid
Chapter 3, Problem 56E(choose chapter or problem)
(a) When a 4.25-g sample of solid ammonium nitrate dissolves in 60.0 g of water in a coffee-cup calorimeter (Figure 5.18), the temperature drops from \(22.0^{\circ} \mathrm{C}\) to \(16.9{ }^{\circ} \mathrm{C}\). Calculate \(\Delta H\left(\right.\) in \(\mathrm{kJ} / \mathrm{mol} \mathrm{NH}_4 \mathrm{NO}_3\)) for the solution process
\(\mathrm{NH}_4 \mathrm{NO}_3(s) \longrightarrow \mathrm{NH}_4^{+}(a q)+\mathrm{NO}_3^{-}(a q)\)
Assume that the specific heat of the solution is the same as that of pure water.
(b) Is this process endothermic or exothermic?
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