Ammonia (NH3) has a higher normal boiling point (–33 ºC) than its heavier congeners PH3 (bp –88 ºC) — States of Matter Chemistry Question
Question
Ammonia (NH3) has a higher normal boiling point (–33 ºC) than its heavier congeners PH3 (bp –88 ºC) or AsH3 (bp –63 ºC). Which is the best explanation for this difference?
A.
NH3 is trigonal pyramidal and polar while PH3 and AsH3 are trigonal planar and nonpolar.
B.
NH3 is much more acidic than PH3 or AsH3.
C.
NH3(l) experiences stronger London dispersion forces than PH3(l) or AsH3(l).
D.✓ Correct
NH3(l) has extensive hydrogen bonding while PH3(l) and AsH3(l) do not.
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