Which condition applies to a solution that follows Raoult's law, representing an ideal solution (where ΔH = heat of mixing, and ΔV = volume change on mixing)?
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Answer: D. Both B. and C.
Explanation
An ideal solution following Raoult law forms with zero enthalpy change and zero volume change upon mixing. Enthalpy of mixing equals zero because intermolecular forces between dissimilar molecules match those in pure components. Volume change on mixing equals zero because molecular packing remains undisturbed when forming the ideal liquid solution. Raoult law describes ideal solution behavior where partial vapor pressure is proportional to liquid mole fraction. Thermodynamic ideality implies that mixing components involves no net thermal energy absorption or release. Excess thermodynamic properties like excess volume and excess enthalpy are strictly zero for ideal liquid mixtures.
Option A describes non ideal behavior with positive heat of mixing and negative volume change, violating ideality. Option B is incomplete because it ignores the necessary zero volume change condition required for ideal solutions. Option C is incomplete because an ideal solution requires both zero heat of mixing and zero volume change simultaneously.
- Subject
- Engineering
- Category
- Chemical Engineering
- Topic
- —
- Difficulty
- medium
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