Intermolecular Forces?

ok so tell me every thing you know about Intermolecular Forces.

this is all for an chem exam and i don't feel like reading 100 pages. any way the help is very much appreciated thanks!

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  • 1 decade ago
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    intermolecular forces are what keep the substance together such as what keeps the molecules of water together, which is different from intramolecular forces which would be what keeps the hydrogen and oxygen atoms together in the water molecule.

    the different types of intermolecular forces are:

    dipole-dipole interactions - where the molecules are polar and their dipoles line up.

    hydrogen bonding - a stronger version of dipole-dipole interaction that only occur when a hydrogen is bonded to either oxygen, nitrogen or flourine

    network covalent bonds - where the substance is just one giant covalent compound such as diamond (carbon- carbon binds). the electrons here are fixed in between the atoms and this is the strongest of ALL the intermolecular forces

    metallic bonding - only happens with metals, it is similar to network covalent bonds except the electrons are free to move from atom to atom. the term they like to use for this is "there is a mobile sea of electrons"

    London dispersion forces - occurs with only non-polar molecules and occurs when the electron cloud shifts to one side and there is a momentary dipole inducing more momentary dipoles. and the more mass a molecule has the stronger the London dispersion force.

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