Intermolecular forces essays

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- Without H20 being polar, there would be no life on Earth, and Earth will be very dry. Humans and living organisims depend on H20 and it's polarity to sustain life on Earth because h20 wouldnt be able to form hydrogen bonds because it isnt polar. Animals who depend on ice such as polar bears and seals wold not be able to live due to ice not floating on the surface of water. When ice lacks crystal lattice structure, it starts to drown, and this happens due to the lack of hydrogen bonding. Therefore, h20 is very important for life to exist on earth.

- h-h: nonpolar covalent bond

- p-cl: covalent

- na-br: ionic

Electronegativity: 0->0.4 = covalent, 0.5->1.7=polar covalent, more than 1.7= ionic bonds, minus the EN

- Ion-induced dipole force: results when an ion is close to a nonpolar molecule distorts the electron density of the nonpolar molecule. The molecule then becomes momentarily polarize, and the two species are attracted to each other. ex: hemoglobin fe2+ helps pick up oxygen from the blood stream.

- Dipole induced dipole force: the charge on a polar molecule is respnsible for inducing the charge on the nonpolar molecule. ex: oxygen and nitrogen dissolve sparingly in water because of dipole induced dipole forces.

-London Dispersion force: are the weakest of the intermolecular forces, and exist between all types of molecules, where ionic or covalent. It is a temporary attractive force that results when the electrons in two adjacent atoms occupy positions that make the atoms form temporary dipoles. The more electrons a molecule has, the stronger the london disperion forces are. For ex: bromine(br2) has more electrons than chloring(cl2), therefore bromine will have a stronger london dispersion forces than chlorine.

-Ion dipole force: is the force of attraction between an ion and a polar molecule.  ex: NaCl desolves in water because attractions between the na+ and cl- ions .

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