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29 Cards in this Set

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Polar Molecule
opposite ends of teh molecule have opposite charges
cohesion
binding of "like" molecules
adhesion
binding of different molecules
surface tension
a measure of how difficult it is to stretch or break the surgace of a liquid
Kinetic Energy
energy of motion
Heat
measure of the total quantity of kinetic energy due to the molecular motion in a body of matter
Temperature
measures the intensity of heat due to the average kinetic energy of the molecules
Celsius Scale
used to indicate temperature
Calorie
the amount of heat energy it takes to raise the temperature of 1g of water by 1 degree Celsius
Kilocalorie
the amount of heat energy it takes to raise the temperature of 1kg of water by 1 degree Celsius
Joule
energy unit. 4.184 of these equals a calorie
Specific heat
a substance is defined as the amount of heat that must be absorbed or lost for 1g of that substance to change its temperature by 1 degree celsius.
Heat of Vaporization
the quantity of heat a liquid must absorb for 1g of it to be converted from the liquid to the gaseous state
evaporative cooling
as liquid evaporates, the surgace of the liquied that remains behind cools down
Solution
a liquid that is a homogeneous mixture of two or more substances
Solvent
dissolving agent
Solute
substance being dissolved
Aqueous Solution
solution in which water is the solvent
Hydration shell
a sphere of water molecules around each dissolved ion
hydrophilic
water loving; ionic or polar
hydrophobic
water hating; non-ionic or nonpolar
Mole
equal in number to the molecular weight of a substance
Molecular Weight
the sum of the weights of all the atoms in a molecule
Molarity
the number of moles of solute per liter of solution
Hydrogen ion
a single proton with a charge of +1
Hydroxide ion
water molecule that lost a proton
Acid
a substance that increases the hydrogen ion concentration of a solution
base
a substance that reduces the hydrogen ion concentration of a solution is called a base
Acid precipitiation
rain, snow, or fog with a more acidic ph than 5.6