PLEASE HELP!! SHOW ALL STEPS!! 6. The following quote about ammonia (NH 3 ) is f

Question

PLEASE HELP!! SHOW ALL STEPS!!

6. The following quote about ammonia (NH3) is from a textbook of inorganic chemistry: “It is estimated that 26% of the hydrogen bonding in NH3 breaks down on melting, 7% on warming from the melting to the boiling point, and the final 67% on transfer to the gas phase at the boiling point.” From the standpoint of the kinetic energy of the molecules, explain
               a) why there is a decrease of hydrogen-bonding energy on melting and
               b) why most of the loss in hydrogen bonding

Explanation / Answer

hydrogen bond is special type of intermoleculer attraction between the hydrogen atom in a polar bond and nonbonding electron pair on a nearby small electronegative atom or ion.

a- On melting the molecules move apart.so less hydrogen bonding can occurs.there fore,there is a decrease of hydrogen-bonding energy on melting .

b-Molecules have enough kinetic ,so they can move apart and overcome the intermoleculer attraction.and most of the loss in hydrogen bonding occure.

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