Intermolecular Forces Essay

1213 Words 5 Pages
The trends in physical properties of organic compounds such as boiling points and melting points can be deducted from their structures, including size (molecular weight, surface area), shape and functional groups. These factors significantly influence the strength of the intermolecular forces of attraction present; and the nature and strength of intermolecular forces determine the variations in boilingpoints of organic compounds. The boiling point of a liquid is the temperature at which its vapor pressure equals the external or atmospheric pressure. At this temperature, every molecules of the liquid acquire enough kinetic energy to overcome the intermolecular forces attracting them to the other molecules. Therefore, boiling points of a compound is a function of the strength of intermolecular forces of attraction between the molecules of compounds which in turn is temperature dependent.
Intermolecular forces are the interactions that exist between molecules, the type and strength of these interactions is determined by the functional groups present. There are generally three types of intermolecular forces between molecules of organic compounds. These include:
Dispersion (London) forces: Dispersion forces are weak interactions caused by momentarily changes in electron density within molecules, which
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These bonds occurs when a hydrogen atom is bonded to oxygen, nitrogen, and fluorine atom of another molecule, or when a hydrogen atom is electrostatically attracted to a lone pair of electrons on oxygen, nitrogen, or fluorine atom of another molecule.Therefore this essay aims at exploring the relationships between the literature boiling points of four organic compounds (1-Pentanol, 3-Methyl-1-Butanol, 2-Hexanone, and 2-Pentanone) using the background theory of the various factors that affect the intermolecular forces within molecules of varying boiling

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