Mixing of two liquids results in the formation of a solution that is relatively colder than the components. What do you conclude from this?
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As the heat is evolved, the enthalpy change is negative. It must be exothermic and also shows negative deviation from raoult's law.
Reason for negative deviation: The intermolecular forces between A-A and B-B are weaker than those between A-B. So, when u mix these kind of solutions, heat will be released and also it leads to decrease in vapour pressure.
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