Which of the following statements most accurately describes the data i...
If we look at the chart, all the gases (HCl and NH3) decreases in solubility as the temperature increases. When gases dissolve in a liquid, it is an exothermic process due to the latent heat released when the gas is brought from the gaseous to liquid or aqueous phase.
As for HCl, there is no hydrogen bonding since only F, O, and N can H-bond. Additionally, gas molecules do not H-bond since the particles are far apart.
Most of the solids increases its solubility as the temperature increase because the dissolution of solids is an endothermic process. Heat would be on the reactant side, and by adding more reactant, the equilibrium shifts to the right.
When considering the dissolution of solids, there are 2 possibilities: endothermic and exothermic. When dissolution is exothermic, more will not dissolve when the temperature increases.
For cesium sulfate, the heat released when new bonds are formed between the ions and water molecules or the enthalpy of hydration is very exothermic. It exceeds the energy required to break the lattice, which is equal to the lattice energy.
The correct answer is that the solubility of cesium sulfate decreases since the enthalpy of hydration releases more heat than is needed for the lattice dissociation energy.