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Frequently Asked Question
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Why does the value of enthalpy or dilution keep decreasing when we dilute a non-ideal solution?
Accepted Answer
The value of enthalpy of dilution keeps decreasing when we dilute a non-ideal solution because the solute-solute interactions become weaker as the solution becomes more dilute. In a non-ideal solution, the solute-solute interactions are stronger than the solute-solvent interactions, so the enthalpy of dilution is positive. As the solution is diluted, the solute-solute interactions become weaker and the solute-solvent interactions become stronger, so the enthalpy of dilution becomes less positive and eventually becomes negative.
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