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Gay-Lussac's Law

Two liquids A...

Question

Two liquids A and B boil at $145^{o} C$ and $190^{o} C$ respectively. Which of them will have higher vapour pressure at $80^{o} C$ ?

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Solution

The liquid $A$ has weak intermolecular forces than $B$ due to its low boiling point. Thus, its tendency to vaporize will be greater than $B$ and its vapor pressure will be more than that of $B$ at $80^{o} C$

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Two liquids x and y boil at 110 degrees and 130 degrees Celsius respectively. Which one of them has higher vapour pressure at 50 degree Celsius? Why?

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1 a t m = 760 m m H g

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