---
title: "A student adds a sample of solid ammonium nitrate, \\(\\text{NH}_4\\text{NO}_3\\text{(s)}\\), to a beaker of water at \\(25^\\circ\\text{C}\\). The dissolution process is represented by the equation below:  \\[\\text{NH}_4\\text{NO}_3\\text{(s)} \\rightarrow \\text{NH}_4^+\\text{(aq)} + \\text{NO}_3^-\\text{(aq)} \\quad \\Delta H^\\circ > 0\\]  Which of the following best predicts the temperature change of the solution as the salt dissolves, and provides the correct justification?"
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url: "https://nerd-notes.com/ubq/119197/"
date_modified: "2026-08-19T12:39:20+00:00"
---

# A student adds a sample of solid ammonium nitrate, \(\text{NH}_4\text{NO}_3\text{(s)}\), to a beaker of water at \(25^\circ\text{C}\). The dissolution process is represented by the equation below:

\[\text{NH}_4\text{NO}_3\text{(s)} \rightarrow \text{NH}_4^+\text{(aq)} + \text{NO}_3^-\text{(aq)} \quad \Delta H^\circ > 0\]

Which of the following best predicts the temperature change of the solution as the salt dissolves, and provides the correct justification?

A student adds a sample of solid ammonium nitrate, \(\text{NH}_4\text{NO}_3\text{(s)}\), to a beaker of water at \(25^\circ\text{C}\). The dissolution process is represented by the equation below:

\[\text{NH}_4\text{NO}_3\text{(s)} \rightarrow \text{NH}_4^+\text{(aq)} + \text{NO}_3^-\text{(aq)} \quad \Delta H^\circ > 0\]

Which of the following best predicts the temperature change of the solution as the salt dissolves, and provides the correct justification?

- **A.** The temperature of the solution increases because the dissolution process is exothermic and releases thermal energy to the solution.
- **B.** The temperature of the solution increases because thermal energy is absorbed by the salt from the surrounding air.
- **C.** The temperature of the solution decreases because the endothermic dissolution process absorbs thermal energy from the solution.
- **D.** The temperature of the solution decreases because the dissolution process releases thermal energy to the surroundings.

*The answer key and step-by-step explanation are available to logged-in users at https://nerd-notes.com/ubq/119197/*