Homework Help: chemistry

Posted by Lea on Friday, October 5, 2012 at 12:32am.

The formulas for ethane, ethene and ethyne are C2H6, C2H4, and C2H2 respectively. Rank this chemicals 1,2,3
(highest)in terms of strength of IMF and explain the structures of the three molecules.
I rank these three based on the bond length so I got C2H2, C2H4, C2H6. I know the structures of these three molecules but I really don't know how can I explain it and where can I based the explanation. pls help

chemistry - DrBob222, Friday, October 5, 2012 at 12:43am
I would say something about the polarity to help explain the IMF forces. You know C2H2 is more polar than the others. For structure you know C2H2 is linear, C2H4 is trigonal planar, C2H6 is tetrahedral for each carbon. I think that should be adequate.

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