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18 Cards in this Set
- Front
- Back
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Properties of Liquids
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fill contain (conform to shape); definite volume
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Intramolecular bonding
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bonds within molecules
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intermolecular bonding
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-bonds between molecule
-allows for the formation of liquids and solids |
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Condensed state
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-gases can be condensed to become liquids and solds when the intermolecular forces overcome the kinetic energy of the gas molecules
-significant forces of attraction between atoms or molecules |
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Ideal conditions for condensing gas
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high pressure, low temperature
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Types of Intermolecular forces
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dipole-dipole; London dispersion forces; hydrogen bonding
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Dipole-dipole forces
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attraction between polar molecules; due to un = charge distribution in e- cloud; neg dipole in Mol A will attract to pos dipole in Mol B
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Approximately _______ of dipole forces are as strong as ___________.
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1%; covalent/ionic bonds
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The _______ the molecules the __________ the bond.
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closer; stronger
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Bond Force
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F= (partial +)(partial -) / r^2
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___________ the boiling point = __________ IMF
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higher the boiling point, stronger the IMF
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Hydrogen bonding
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type of dipole-dipole force; strongest of the dipole dipole forces; occurs between highly polar strong molecules
- H with F,O,N - high boiling point ex: H20 at room temp, DNA |
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London Dispersion Forces
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explain the dense state of nonpolar molecule; e- cloud influences another e- cloud; temporarily induces dipole; unequal distribution of moving electrons
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London Dispersion Forces caused by ________________.
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e- influcing each otehr in proximity; distorts e- clouds; dipoles form
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polarizability
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ease with which electron cloud is distorted causing temporary dipole; high pressure causes condensing, bringing e clouds closer
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London dispersion forces
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weakest of all IMF, more electrons = great polarizability
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Properties of Liquids
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low compressablility, lack of rgidity, surface tension
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Surface Tension
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molecules on surface are only beign attracted in 5 directions as opposed to the bulk molecules being pulled in 6 directions; stronger forces on surface
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