alleryFor an **ideal** solution, the enthalpy of mixing $\Delta_{mix}H$ is:
ANegative
BEqual to T·ΔS
CZero
DPositive
Answer & Solution
Correct answer: C. Zero
Ideal solutions obey Raoult's law over all compositions.
solute–solvent, solute–solute and solvent–solvent interactions are comparable
so no heat is released or absorbed on mixing — $\Delta_{mix}H = 0$ (and $\Delta_{mix}V = 0$).
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