Sunday, February 27, 2011

Intermolecular Forces

In a hypothetical situation, if one molecule of ethanol was attracted to another molecule of ethanol, what intermolecular forces would act on it?

 If two ethanol molecules were ever attracted to one another, dispersion forces, dipole dipole, and hydrogen bonding would all be present. This is because:
  • Dispersion forces act on all molecules. Dispersion forces occurs when an uneven distribution of electrons, caused by their movement around the molecule results in a temporary dipole.
  • Dipole dipole occurs when there is a electrostatic attraction between the positively charged end of one molecule (Hydrogen) and the negatively charged end of another (Oxygen). This force is denoted by the dotted line.
  • Hydrogen bonding is a special type of Dipole dipole where a temporary covalent bond is formed between a Hydrogen atom and in this case, an Oxygen atom. This force is denoted by the dark line next to the dotted line. 




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