Chapter 4, Problem 4.18NP

A sample of ${\text{Na}}_{\text{2}}{\text{SO}}_{\text{4}}\left(\text{s}\right)$ is dissolved in 225 g of water at 298 K such that the solution is 0.325 molar in ${\text{Na}}_{\text{2}}{\text{SO}}_{\text{4}}$. A temperature rise of $0.\text{146}°\text{C}$ is observed. The calorimeter constant is $\text{33}0.{\text{ J K}}^{-\text{1}}$. Calculate the enthalpy of solution of ${\text{Na}}_{\text{2}}{\text{SO}}_{\text{4}}$ in water at this concentration. Compare your result with that calculated using the data in Table 4.1 (Appendix A, Data Tables).