AP Chemistry
9.6 Free Energy of Dissolution
9.3 Gibbs Free Energy and Thermodynamic Favorability
9.1 Introduction to Entropy
A student dissolves a sample of solid ammonium nitrate, \(\text{NH}_4\text{NO}_3\text{(s)}\), in distilled water at \(298\text{ K}\) according to the equation below.
\[ \text{NH}_4\text{NO}_3\text{(s)} \rightleftharpoons \text{NH}_4^+\text{(aq)} + \text{NO}_3^-\text{(aq)} \]
As the solid dissolves, the temperature of the mixture decreases from \(25.0^\circ\text{C}\) to \(18.4^\circ\text{C}\). Which of the following correctly identifies the signs of \(\Delta H_{\text{soln}}^\circ\) and \(\Delta S_{\text{soln}}^\circ\), and predicts the effect of increasing temperature on the solubility of \(\text{NH}_4\text{NO}_3\text{(s)}\)?
\[ \text{NH}_4\text{NO}_3\text{(s)} \rightleftharpoons \text{NH}_4^+\text{(aq)} + \text{NO}_3^-\text{(aq)} \]
As the solid dissolves, the temperature of the mixture decreases from \(25.0^\circ\text{C}\) to \(18.4^\circ\text{C}\). Which of the following correctly identifies the signs of \(\Delta H_{\text{soln}}^\circ\) and \(\Delta S_{\text{soln}}^\circ\), and predicts the effect of increasing temperature on the solubility of \(\text{NH}_4\text{NO}_3\text{(s)}\)?
Similar Questions
Tools for a 5
AP aligned mock tests to help you get a 5.
With grading, adaptive explanations, and more.
Find a Quiz
Find, solve, and grade every AP FRQ ever.
Find an FRQ
Stuck on AP Chemistry? Get unstuck with an AP specialist.1 to 1 tutors who know the exam inside out. Understand weeks of material in a single session.Find a Tutor
Learn AP Physics from scratch, quickly. This is the only course you'll need for the year.
A self-paced course with everything you need to get a 5. Trusted by over 15,000 students and 200+ schools. Learn fast, or we'll refund your purchase, backed by our 100% satisfaction guarantee.
Explore the Course