Question

Even though HF has lower molecular
mass compared to HCl, HF is in the
liquid state and HCl is in the
gaseous state at room temperature.
Why?​

Answer 1

Answer:

Due to greater electronegativity of F over Cl, F forms stronger H-bonds as compared to Cl. As a result, more energy is needed to break the H-bonds in HF than in HCl and hence the b.p. of HF is higher than that of HCl. Consequently, H-F is liquid while HCl is a gas at room temperature.

Explanation:

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