What is positive deviation
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a positive deviation means that there is a higher than expected vapour pressure above the solution
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Answer:
Rauolt's law
Explanation:
Positive deviation from Rauolt's law means that the observed vapour pressure is greater than expected and It occur when A-B attractions are weaker than the average of the attraction in the pure component of the mixture. For example, a mixture of ethnol and ecetone show a positive deviation from Rault's law.
In case of solutions showing positive deviations, absorption of heat takes place, i.e., Δmix H has a positive (+) sign.
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