Question

/even though hf has lower moleculer 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

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