anonymous
  • anonymous
What does it mean by Van Der Waals forces of attraction?
Chemistry
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katieb
  • katieb
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anonymous
  • anonymous
attraction between or molecules which are weak
anonymous
  • anonymous
attraction between or molecules which are weak
anonymous
  • anonymous
not within

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anonymous
  • anonymous
attraction between all molecules, this is a relatively weak kind of force. the covalent forces etc, are much stronger
anonymous
  • anonymous
like an alkane and an alkane have van der waals which is momentarilly +/- charges alternating between two molecules for a brief moment. But alkanes are not the only ones that have van der waals or london dispersions
anonymous
  • anonymous
In physical chemistry, the van der Waals force (or van der Waals interaction), named after Dutch scientist Johannes Diderik van der Waals, is the sum of the attractive or repulsive forces between molecules (or between parts of the same molecule) other than those due to covalent bonds or to the electrostatic interaction of ions with one another or with neutral molecules.[1] The term includes: force between two permanent dipoles (Keesom force) force between a permanent dipole and a corresponding induced dipole (Debye force) force between two instantaneously induced dipoles (London dispersion force) It is also sometimes used loosely as a synonym for the totality of intermolecular forces. Van der Waals forces are relatively weak compared to normal chemical bonds, but play a fundamental role in fields as diverse as supramolecular chemistry, structural biology, polymer science, nanotechnology, surface science, and condensed matter physics. Van der Waals forces define the chemical character of many organic compounds. They also define the solubility of organic substances in polar and non-polar media. In low molecular weight alcohols, the properties of the polar hydroxyl group dominate the weak intermolecular forces of van der Waals. In higher molecular weight alcohols, the properties of the nonpolar hydrocarbon chain(s) dominate and define the solubility. Van der Waals-London forces grow with the length of the nonpolar part of the substance.

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