Heat of Solution Calorimeter

Introduction to heat of solution calorimeter:

Absorption or generation of heat usually occurs when two or more substances are mixed together forming a solution. At constant pressure, the change in heat during mixing is equal to the enthalpy change. Water is generally used as the solvent for the measurement of heat of solution, which depends upon the nature of the solute and the quantity of the solute in the solution. Heat of solution is calculated using a calorimeter that measures the temperature change in the water at the time of dissolution of the solute. I like to share this Heat Formula with you all through my article.

Using a Calorimeter for the Measurement of Heat of Solution

The calorimeter used for the calculation of heat of solution is constructed in such a way that there would be no exchange of heat between the surrounding environment and the calorimeter but there are exchanges of heat between the components within the calorimeter. While using a calorimeter, heat of solution is calculated by assuming that change in the solutes’ heat is equal to the change in water’s heat using the formula:

Masswater * ΔT water * specific heat water = ΔHwater

Where change in heat of the water is denoted as ΔHwater,

Mass water = change in the heat of the solute,

T water = change in the temperature of the water and

Specific heat water = 0.004184 kJ/g oC. Please express your views of this topic Dipole Magnetic Field by commenting on blog.

Procedure for the Calculation of Heat of Solution

A basic calorimeter is prepared by using thermometer, a polystyrene cup and a beaker. Different salts when dissolved in water show different changes of the heat of the solution.

Steps involved in the measurement of heat of solution:

Take 50 ml of distilled water in a beaker and place a thermometer into the beaker such that the bulb of the thermometer is immersed in the water but does not touch the bottom.
The initial temperature of the water is noted down.
Weigh 5g of any salt and mix thoroughly in the water by swirling.
Switch the timer on and record the temperature until the temperature decrease or increase ceases.

Conclusion for the Calculation of Heat of Solution

To conclude, heat of solution, is defined as the enthalpy of the solution when a solute is dissolved in water. The heat change may be endothermic or exothermic, which is measured using a calorimeter.