Comparing Methane and Methanol




   methane            methanol


  Why is methane a gas at room temperature and methanol a liquid? 

Take a look at the electrostatic potential map of  the molecules below showing charge distribution.   The red indicates a region with a negative charge  and the blue indicates a positive charge. 


methane            methanol

The methane molecule has an overall white color - what does this indicate?

The methanol molecule has a region of blue and a region of red indicating that the charge is unevenly distributed - the molecule is polar.


To be continued ...

   polarity -->  IMFs


Shari Chapman            Richard Montgomery High School            6/2003

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