Stack #155940
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| polar molecule | opposite ends of the molecule have opposite charges
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| cohesion | force holding a substance together
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| adhesion | clinging of one substance to another
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| surface tension | measure of how difficult it is to strech or break the surface of a liquid
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| kinetic energy | the energy motion
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| heat | measure of the total quantity of kinetic energy due to molecular motion in a body of matter
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| temperature | measures the intesity of heat due to the average inetic energy of a molecule
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| celcius scale | scale used for measureing temperature. water freezes at 0 and boils at 100.
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| calorie | the amount of heat energy it takes to raise the temp. of 1g of water release when it cools by 1 degree celcius
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| kilocalorie | 1000 cal
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| specific heat | amount of heat that must be absorbed or lost for 1g of that substance to change it's temp. by 1 degree celcius
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| heat vaporization | the quantity of heat a liquid must absorb for 1g of it to be convert from the liquid to the gaseous state
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| evaporative cooling | the hottest molecules those with the greatest kinetic energy are most likely to leave the gas phase
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| solution | two or more substances
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| solvent | dissolving agent of a solution
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| solute | substance that is dissolved
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| aqueous solution | water is the solvent
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| hydrophilic | a substance cannot dissolve because the molecules are too large
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| hydrophobic | substance that is non ionic and non polar that repel water
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| mole | is equal to the molecular weight of a substance
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| molecular weight | sum of the weights of all of the atoms of a molecule
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| molarity | number of moles per liter of solution
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| hydrogen ion | a single proton with a charge of +1
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| hydroxide ion | lost a proton with a charge of -1
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| acid | increases the H+ concentration of a solution
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| base | substance that reduces the hydrogen ion concentration in a solution
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| pH scale | measure of hydrogen ion concentration equal to the -log[H+] and ranging in value from 0-14
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| buffers | substances the minimize changes in the concentrations of the acids and bases in a solution
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| acid precipitation | rain, snow, or fog more acidic than 5.6
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