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For an ideal solution, both the enthalpy of mixing and the volume of mixing are:
ANegative
BZero
CPositive
DEqual in magnitude but opposite in sign
Answer & Solution
Correct answer: B. Zero
Defining feature of an **ideal solution**: Δ_mix H = 0 AND Δ_mix V = 0. A-A, B-B and A-B intermolecular forces are essentially equal.
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