2.3 CHAPTER 2. INTERMOLECULAR FORCES
(c) Ion-dipole forces exist between molecules of HF
(d) At room temperatureN 2 is usually a liquid
- The respective boiling points for four chemical substances are givenbelow:
Hydrogen sulphide− 60 ◦C
Ammonia− 33 ◦C
Hydrogen fluoride 20 ◦C
Water 100 ◦C
(a) Which one of the substances exhibits the strongest forces of attraction between
its molecules in the liquid state?
(b) Give the name of the force responsible for the relatively high boiling points of
ammonia and water andexplain how this force originates.
(c) The shapes of the molecules of hydrogen sulfide and water are similar, yet their
boiling points differ. Explain.
(IEB Paper 2, 2002)
More practice video solutions or help at http://www.everythingscience.co.za
(1.) 00wh (2.) 00wi (3.) 00wj (4.) 01xy
