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Answered 2009-12-09 18:28:22

NH3 is a polar molecule, so the molecules attract each other like magnets.
CH4 is completely symmetrical, so it is non polar.

Therefore, NH3 has a higher boiling point because it takes more energy to knock its molecules away.

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inter molecular forces or inner molecular forces


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SO2 has a higher boiling pt because it has a greater molecular mass, SO2 is a pola r molecule which forms dipole-dipole forces which increases the boiling point


The intra and inter molecular forces will help to determine the higher boiling.Intra molecular forces are Polar/Non-polar covalent bonds and ionic bonds. Covalent bonds are stronger than ionic bonds.Polar covalent bonds will have a higher boiling point because non-polar covalent bonds are only affected by London forces.Intermolecular forces are hydrogen bonding, diapole-diapole and London. All molecules have London forces.Also the higher the electro-negativity the higher the boiling point.If all of the intra and inter molecular forces are the same, refer to the electro-negativity and size. The greater the electro-negativity and size, the higher the boiling point.


HI has a higher boiling point because of the dipole-dipole Intermolecular forces as well as the dispersion forces, which become more evident with molecular weight, which will dominate over the dipole-dipole forces, so HCl has a lower boiloing point.



The greater the intermolecular forces in a liquid, the higher is its boiling point.


The bigger the mass the higher the boiling point.


Viscosity is the thickness of the compound. The thicker the compound the higher the intermolecular forces. The higher the intermolecular forces the higher the boiling point is.


yes, they have more London dispersion forces and therefore have a higher boiling point


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Straight chain isomers have higher boiling point than their more compact isomers because there are fewer dispersion forces in the symmetrical molecule The dispersion forces of straight chain alkanes increase with molecular weight. Stronger intermolecular forces develop in long chains, and the boiling point and melting point increase with MW.


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