AP Chemistry 9.6 Dissolution Free Energy Review

Review AP Chemistry 9.6 by connecting enthalpy, entropy, and Gibbs free energy to dissolution behaviour and the solubility of ionic compounds.

Exam points

explain dissolution enthalpy and entropy from lattice, solvent and solute-solvent interactions
connect the sign of dissolution enthalpy with temperature effects on solubility

Covered syllabus points

9.6.A—Explain the relationship between the solubility of a salt and changes in the enthalpy and entropy that occur in…

[Maximum number: 1]

34. The process of dissolution of $\mathrm{NaCl}(s)$ in $\mathrm{H}_{2} \mathrm{O}(l)$ is represented in the diagram above. Which of the following summarizes the signs of $\Delta H^{\circ}$ and $\Delta S^{\circ}$ for each part of the dissolution process?

$\underline{\Delta H^{\circ}}$

$\underline{\Delta S^{\circ}}$

$\underline{\Delta H^{\circ}}$

$\underline{\Delta S^{\circ}}$

$\underline{\Delta H^{\circ}}$

$\underline{\Delta S^{\circ}}$

Figure for Question 9.6 Free Energy of Dissolution question 1 — AP Chemistry

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Covered syllabus points

9.6 Free Energy of Dissolution question 1