Q.

Which has the highest heat of vaporization?

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a

HF

b

HCl

c

HBr

d

HI

answer is A.

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Detailed Solution

Because of the substantial H-bonding in HF, it takes more energy to transform a given amount of HF from liquid to vapor. Thus, HF has the highest molar enthalpy of vaporization among all hydrogen halides.

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