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Explain why a solution of chloroform and acetone shows negative deviation from Raoult's law. |
Answer» Solution :Solution of chloroform and acetone shows negative deviation from RAOULT. s law : Negative deviation is shown when vapour pressure of RESULTING solution is low and its boiling point is high. Chloroform and acetone on mixing form (H-Bond in acetone and chloroform molecules) Since new attractive forces which COME into existence in these solutions are RELATIVELY stronger, therefore these solutions are accompanied by evolution of HEAT `(DeltaH_("mix") = `- ve). Also because of stronger forces of attraction among molecules in solution, the molecules come closer and hence volume of solution is less than the total `(DeltaV_("max")-ve)` . |
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