And that means whenever we go from liquid to gas, we're breaking intermolecular bonds. So that means if this has a higher boiling point, that means this guy forms stronger intermolecular bonds. And that's exactly why longer the longer our carbon chain is, the stronger our intermolecular bonds are, because we have more surface area, we have more vandalbile forces than in this symmetrical case. Remember, whenever we have a sphere, we have the minimum amount of surface area. So the longer our alkane is, the higher the boiling point is. Now, on the contrary, the more symmetry we have in our alkane, the higher the melting point is.