How does the number of carbon atoms in a hydrocarbon atom affect its boiling point?

Answer 1

The more is the number of carbons in the alkane, the more is its boiling point.

REASON:- As the number of carbon increases, the becomes the molecular mass. And the more is the molecular mass, the greater becomes the surface area which increases the van der Waal force of intermolecular attraction thereby increasing the boiling point of the alkane.

NOTE:- Among isomers (of the same alkane), the structure which have more # of side chain has less BP because more the # of side chains are present, more will the structure will be closer to the shape of a sphere, therefore will have smaller surface area.

-by spd831

Answer 2

In general: higher number of C atoms, higher boiling point, BUT also the degree of branching (from C4H10), the number of double bonds (C=C) and presence of rings (from cyclo-C3H6) are very important.

Answer 3

As the number of carbon atoms in these molecules increase, the boiling point increases.

Answer 4

Very, very approximately, the boiling point goes up as the number of carbon atoms goes up.

Answer 5

Increasing the number of carbon atoms in molecules the boiling point is increased.

Answer 6

The more carbon atoms, the higher the boiling point.

Answer 7

Higher the molecular size, higher the boiling point.

Answer 8

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