PH3 has lower boiling point than NH3.explain.
Answers
Answered by
63
There is simple explanation for this and that is the presence of hydrogen bonding.
As in the NH3 molecules, there is bond between N-H , the hydrogen bond. These hydrogen bonding are considered strong bonds So there is more force required to break them which is essential in order to change the state of the substance or to convert it in to vapor. While in case of PH3 the weak inter-molecular forces are present .This why NH3 boiling boint is quite high.
As in the NH3 molecules, there is bond between N-H , the hydrogen bond. These hydrogen bonding are considered strong bonds So there is more force required to break them which is essential in order to change the state of the substance or to convert it in to vapor. While in case of PH3 the weak inter-molecular forces are present .This why NH3 boiling boint is quite high.
Answered by
49
Ammonia _NH3 has a boiling point of -33°c and Phosphine [PH3] has a boiling point of -83°c.
Reason :
NH3 is a polar molecule with strong Hydrogen bonding.This hydrogen bonding is the strongest of all the bonds and results in greater attraction between NH3 molecule than in PH3 molecules which has weak dispersion forces .
Reason :
NH3 is a polar molecule with strong Hydrogen bonding.This hydrogen bonding is the strongest of all the bonds and results in greater attraction between NH3 molecule than in PH3 molecules which has weak dispersion forces .
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