Chemistry · The vapour pressure of solutions and Raoult's Law - Ideal and non-ideal solutions, vapour pressure composition, plots for ideal and non-ideal solutions
Which of the following solutions shows positive deviation from Raoult's law?
Which of the following solutions shows positive deviation from Raoult's law?
- A. Acetone + Aniline
- B. Acetone + Ethanol
- C. water + Nitric acid
- D. Chloroform + Benzene
Step-by-step solution
Positive deviation from Raoult's law occurs when the vapor pressure of the solution is higher than predicted, indicating weaker intermolecular interactions in the mixture than in pure components. In the acetone-ethanol mixture, hydrogen bonding between ethanol molecules is disrupted by acetone, leading to increased vapor pressure. The other options involve stronger interactions (hydrogen bonding or acid-base) leading to negative deviation.
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