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11 Nov 2021
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The difference in energy of the reactants and products is known as the change in enthalpy of the reaction.
The heat of the reaction is also known as the change in enthalpy and is denoted by the 
.
.Step-by-step explanation
Step 1.
The enthalpy change of a solute (
) is the change in energy that occurs in solute particles when they mix with solvent particles, while the enthalpy change of a solvent (
) is the change in energy that occurs in solvent particles when they mix with solute particles.
Because no energy is absorbed or released from the system, the enthalpy of mixing of the given system is equal to the sum of the enthalpy changes of the solute and solvent.
As a result, the sum of solute and solvent enthalpy changes is equal to and opposite to the enthalpy change of mixing.
Solute and solvent enthalpy changes are positive while mixing enthalpy changes are negative.
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