The boiling points of the hydrogen halides are listedbelow: HF 19 deg C HCl -85d

Question

The boiling points of the hydrogen halides are listedbelow:     HF 19 deg C    HCl -85deg C   Hbr -67 deg C HI -35 deg C Which of the following accounts for the relatively highboiling point of HF?    1. HF has the strongest H-X bond.    2. HF molecules form hydrogen bonds.    3. HF bonds have strong Van der Waalsattractions. a) 1 only.      b) 2only.       c) 3only.        d) 1 and 2only. The boiling points of the hydrogen halides are listedbelow:     HF 19 deg C    HCl -85deg C   Hbr -67 deg C HI -35 deg C Which of the following accounts for the relatively highboiling point of HF?    1. HF has the strongest H-X bond.    2. HF molecules form hydrogen bonds.    3. HF bonds have strong Van der Waalsattractions. a) 1 only.      b) 2only.       c) 3only.        d) 1 and 2only.

Explanation / Answer

      The boiling point ofa substance depends on the strength of the intermolecularforces. The high boiling point of HF is due to thestrong hydrogen bonding between the HF molecules.                 F-H---F-H---F-H---F-H---etc
           Boiling point = 19oC

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