Intermolecular Forces Answers – Flashcards
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| the state of matter of a substance is determined by... |
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| intermolecular forces(attractive forces) |
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| name the three types of intermolecular forces from weakest to strongest. |
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| london dispersion forces, dipole-dipole forces, hydrogen bonding. |
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| polar molecules have a _____ difference in electronegativity between atoms. |
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| Large |
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| The large difference in electronegativity between atoms in polar molecules creates |
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| partial charges |
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| london dispersion forces have neutral atoms because |
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| the number of protons equals the number of electrons |
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| london dispersion force- |
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| the force of attraction between two neighboring temporary dipoles. |
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| one dipole can cause a neighboring atom to turn into a dipole, called an |
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| induced dipole. |
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| dipole-dipole forces |
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| attraction between neighboring permanent dipoles. |
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| dipole-dipole forces result from |
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| permanenet dipoles |
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| hydrogen bonding |
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| basially really freaking strong dipole-dipole forces |
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| hydrogen has really low electronnegativity and when it is combined with other elements with high electro. it creates partial charges |
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| because the partial charges are strong, the dipole-dipole force is strong |
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| the least common state of matter |
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| liquid because they only exist in narrow range of temp and pressure |
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| particles of a liquid |
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| high density, relative incompressibility because the particles are ightly packed. |
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| particles of a liquid |
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| high density, relative incompressibility because the particles are ightly packed. |
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| why can liquids diffuse and dissolve |
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| the particles are in costant random motion. |
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| surface tension |
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| force that pulls together adjacent particles of a liquids surface. |
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| if temperature increases, surface tension_____ |
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| decreases |
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| most, but not all, solids are________ but some are amorphous(without shape) |
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| crystalline |
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| glass |
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| super cooled liquid |
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| when heated an amorphous solid will ______ before it melts |
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| soften |
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| name some amorphous solids |
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| butter, chocolate |
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| The particles of a solid will______ and are stuck in position. |
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| vibrate |
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| the particles in a solid cant move because of intermolecular forces. |
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| sublimation |
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| solid to gas |
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| deposition |
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| gas to solid |
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| heat is required to break |
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| intermolecular forces |
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| heat is released if intermolecular forces are |
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| strengthened or formed. |
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| Heat of Fusion |
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| energy require to melt one mol. of a solid |
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| heat of vaporization |
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| energy require to boil one mol. of a liquid |
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| melting is endothermic because |
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| heat is require to weaken intermolecular forces |
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| boiling is endothermic because |
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| heat is required to break Intermolecular forces. |
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| equilibrium |
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| rate of evaporation will equal rate of condensation |
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| equilibrium vapor pressure |
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| the pressure of a gas at equilibrium with its corresponding liquid. |
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| le chatlier's principle |
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| if a system at equilibrium loses its equilibrium, it will adjust itself in an attempt to return to equil. |
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| temperature at which a liquid's equiilibrium vapor pressure equals atmospheric pressure. |
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| boiling point |
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| boiling point depends upon |
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| the strength of intermolecular forces of the liquid, and atm. |
