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Bio: Chapter 3

TermDefinition
Polar Molecule Unequal distribution of electrons. The two ends of the molecule have opposite charges.
Cohesion the molecular force between particles within a body or substance that acts to unite them.
Adhesion The clinging of one substance to another.
Surface Tension Measure of how difficult it is to stretch or break the surface of a liquid.
Kinetic Energy Energy of motion
Heat Form of energy/ total kinetic energy
Temperature Measure of heat intensity/ average kinetic energy
Specific Heat The amount of heat that must be gained or lost for 1 g of that substance to change its temperature by 1 C.
Heat of vaporization Quantity of heat a liquid must absorb for 1 g of it to be converted from liquid to gas.
Solution A liquid that is a completely homogenous mixture of 2 or more substances.
Hydration Shell The sphere of water molecules around each dissolved ion.
Hydrophilic Substance that has an affinity for water
Hydrophobic Substances that repel water.
Base pH>7
Acid pH<7
Neutral pH=7
pH= -log(H+)
Buffer Substance that minimizes change in the concentration of H+ and OH- in a solution.
Acid Precipitation Any precipitin with a pH lower than 5.2
Created by: Gianna B
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