Question

why ethanol has minimum vapour pressure than propanal?​

Answer 1

Answer:

ethanol is capable of hydrogen bonding and, therefore, exhibits stronger overall IMFs, which means that fewer molecules escape from the liquid at any given temperature, and so ethanol has a lower vapor pressure than diethyl ether....

hope it will help you ✌️✌️

Answer 2

Explanation:

p=p1+p2

⇒p=p10x1+p20x2                   ( Raoult's law )

     p=p10(1−x2)+p20x2

     p=p10+(p20−p10)x2

     279mm=p10+(p20−p10)x2

Let 2, ethanol

      1, propanol 

∴279mm=210mm+(p20−210)0.6

    69=(p20−210)0.6

    p2−210=115

⇒p20=325mm