Posted by eliz on Monday, March 16, 2009 at 10:09pm.
Read about intermolecular forces.
Two things in particular.
In general, the boiling point is higher for more mass which just means adding to obtain the molar mass and checking that one for the higher boiling point. For isomers with the same mass, the more compact ones tend to boil at a lower temperature. For example, n-butane you would expect to be higher boiling than tetramethyl methane.
The second thing is hydrogen bonding. Hydrogen bonding makes the boiling point much higher than would be expected, even for lower molecular mass molecules. Hydrogen bonding is always something to consider with the elements with higher electronegativity such as N, F, and O. I see three of the molecules have that but I would expect H bonding to be more of a factor with CH3OH than CH3F. The electronegativity of N is less than that of O. O2 is not polar and you would expect it to have a lower boiling point than any of the otherrs.
Related Questions
chemistry - imagine replacing one H atom of a methane molecule, ch4, with ...
chemistry - Given the compounds H2S, NH3, and SO2. Determine the order o boiling...
chemistry - Suppose you are given a list of solutions (all with nonvolatile ...
chemistry - The alkanes are a homologous series of compounds containing only ...
chemistry (college final) - How to determine which of the compounds will have ...
chemistry - The compound with the highest boiling point will be which of the ...
Chemistry - How many CO2 molecules would be formed from the reaction mixture ...
AP Chemistry - From the following: pure water solution of C12H22O11 (m=0.01) in ...
Math - I really really need help on this one. I have no clue on how to do it; ...
chemistry - Which has the highest boiling point and lowest freezing point? (a) 0...
For Further Reading
