Enthalpy of Dissolution

The enthalpy of dissolution is the thermal energy involved in the process of forming a solution, i.e. dissolving a solute in a solvent. The energy associated with the dissolution of the solute either comes from or goes to its surroundings, the solvent. Therefore, the temperature of the solution changes as solute dissolves.

This module numerically and graphically demonstrates the effects of the dissolution of various compounds in water.

.

INSTRUCTIONS

1. Select a solute by clicking on one of the Solute option buttons.
2. Select the amount of solvent by clicking one of the Mass of Water option buttons.
3. To begin the experiment, click on the Add Solute button. The more you click, the more solute you get (maximum = 30. g).
4. Click on the Clear Plot button to clear the plot area. Plots of different solutes dissolving in the same amount of water can be overlaid.
5. The temperature change of the solution appears in the temperature change box. If the maximum amount of solute that can be dissolved in the solvent is reached, the box reports that the solution is saturated.