Chapter 12, Problem 10RQ

Heats of Solution

Referring to Question 12.9, which value for this compound would be numerically larger, its lattice energy or its hydration energy?

The value of $\Delta H_{soln}$ for a soluble compound is, say, ${\text{+26 kJ mol}}^{\text{-1}}$, and a nearly saturated solution is prepared in an insulated container (e.g., a coffee cup calorimeter). Will the system's temperature increase or decrease as the solute dissolves?