Why boiling point of NH3 is higher than that of PH3?

NH3 molecules makes strong intermolecular H bonding b/w themselves. But due to lesser electronegativity of larger PH3 molecules, they cannot form Hydrogen Bonding b/w themselves. In NH3, there is hydrogen bonding whereas in PH3 there is no hydrogen bonding. Therefore, the NH3 has higher boiling point than PH3.

Why does NH3 have a higher boiling point than PH3 but CH4 has a lower boiling point than sh4?

The intermolecular attractive forces occurring in, CH4 are only London dispersion forces. Hydrogen-bonding attractive forces are stronger forces compared to dispersion forces when atoms are in the second period. Therefore, NH3 has a higher boiling point compared to CH4.

Why boiling point of NH3 is greater than AsH3?

Because the degree and magnitude of intermolecular bonding between ammonia molecules is much greater than that between phosphine, and arsine molecules.

Is boiling point of SbH3 greater than NH3?

Stibane has a higher boiling point than ammonia/azane on account of van der Waals interactions (owing to the larger size of the antimony atom).

Why PH3 is more volatile than NH3?

Yes, PH3 is more volatile than NH3, because boiling point of phosphine is -87.7 Co, while boiling point of ammonia is -33.34 Co. What means that phosphine evaporates faster than ammonia.

Why does PH3 have a lower boiling point than AsH3?

AsH3 is a larger molecule than PH3 as As is lower down the periodic table, so has a higher atomic number so more electrons. Therefore AsH3 has more electrons than PH3 meaning that the instantaneous dipole produced by AsH3 is greater.

Why does PH3 have a higher boiling point than CH4?

NH3 is highest because the N-H bonds give it Hydrogen Bonding Intermolecular Forces. PH3 is next highest because it has dipole dipole forces, which are weaker than “hydrogen bonding” CH4 has neither of those.

Does AsH3 or SbH3 have a higher boiling point?

Hence, as SbH3 is greater in size, has greater molecular weight; its boiling pint is higher than NH3. In the case, of AsH3, even this molecule is gas at room temperature and its boiling point should be greater than NH3, but this is not the case and NH3 has a higher boiling point than AsH3.

Why AsH3 has higher boiling point than PH3?

Arsenic, being farther down on the Periodic Table than Phosphorus, has more electrons that may group together and form instantaneous dipoles. We can say that AsH3 has a higher boiling point than PH3 because arsenic has a higher polarizability than phosphorus.

Which has a higher boiling point AsH3 or SbH3?

Inspite of nonpolar compounds,the intermolecular force among the SbH3 molecules is stronger than that of AsH3. Hence,SbH3 has a higher boiling point than AsH3.

What is the boiling point of SbH3?

-0.4°F (-18°C)
Stibine/Boiling point

Does NH3 or PH3 have a lower boiling point?

1. Ammonia, NH3, has a much higher boiling point than phosphine, PH3. This is because: (A) NH3 has a lower molecular weight than PH3.