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Which of the following shows positive deviation from Raoult's law ? |
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Answer» Solution :(i) LET us consider the positive deviation shown by a solution of ethyl alcohl and water. (ii) In this solution, the HYDROGEN bonding INTERACTION between ethnol and water is weaker than those hydrogen bonding interactions amongst themselves (ethyl alcohol-ethyl alcohol and water-water interaction). (iii) This results in the increased evaporation of both components from the aqueous solution of ethanol (iv) Here, the mixing process is endothermic i.e., `Delta H _("mixing") gt 0` and there will bge a slight increase in VOLUME `(Delta V_("mixing")gt 0)`  Vapout pressure diagram showing positive deviation |
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