Total Heat for Dissolution Reaction Calculation

Calculation of Total Heat for Dissolution Reaction

To calculate the total heat for the dissolution reaction, we first need to determine the heat absorbed or released by the system. In this case, the system is the dissolution reaction of the salt in water.

The heat gained by the solution during the dissolution process is 3.15 x 10^3 J. According to the first law of thermodynamics, the heat gained by the surroundings is equal in magnitude but opposite in sign to the heat lost by the system.

Since the surroundings absorbed 3.19 x 10^3 J of heat, the system, which is the dissolution reaction, must have lost the same amount of heat. Therefore, the total heat for the dissolution reaction of the 6.13 g of salt is -3.19 x 10^3 J (or -3190 J).

Application of Conservation of Energy Principle

The principle of conservation of energy states that energy cannot be created or destroyed, only transferred or converted from one form to another. In the context of thermodynamics, this principle applies to the heat exchange between a system and its surroundings.

When a substance dissolves in a solvent, there is a transfer of energy in the form of heat. In this case, the dissolution reaction of the salt in water resulted in the absorption of 3.15 x 10^3 J of heat by the solution. This heat transfer is balanced by an equal but opposite heat loss by the dissolution reaction, resulting in a total heat of -3.19 x 10^3 J.

In conclusion, the total heat for the dissolution reaction of the 6.13 g of salt can be determined by considering the heat exchange in the system and its surroundings. The negative value of -3190 J indicates that the dissolution reaction of the salt released energy in the form of heat during the process.