APFIVE Enthalpy of Solution and Temperature Change
Ammonium nitrate (NH₄NO₃) dissolves endothermically in water with an enthalpy of solution of $$+25.7\,kJ/mol$$. If 10.0 g of NH₄NO₃ (molar mass ≈ 80 g/mol) is dissolved, determine the energy change and the expected temperature change of the solution.
A
Approximately $$3.21\,kJ$$ of energy is released and the temperature increases.
B
Approximately $$3.21\,kJ$$ of energy is absorbed and the temperature remains constant.
C
Approximately $$0.321\,kJ$$ of energy is absorbed and the temperature decreases.
D
Approximately $$3.21\,kJ$$ of energy is absorbed and the temperature decreases.
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