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CHEM CH 2 Intro
Question | Answer |
---|---|
temperature where all molecules stop moving [coldest temp. possible] | absolute zero |
SOM with definite shape & definite volume | solid |
SOM with definite volume but indefinite shape | liquid |
SOM with indefinite volume & indefinite shape | gas |
gaseous state of anything that is normally a solid or liquid at room temperature | vapor |
most common SOM in the universe | plasma |
chemical blend of 2 or more different elements in a fixed ratio | compound |
physical blend of 2 or more things in a varying ratio | mixture |
aka homogeneous mixture | solution |
part of solution that is mixed in [lesser amount] | solute |
part of solution that that does the mixing [higher amount] | solvent |
mixture that looks the same throughout | homogeneous mixture |
mixture that looks different | heterogeneous mixture |
separation by different boiling points | distillation |
separation by different sizes | filtration |
going from solid to gas | sublimation |
going from liquid to solid | freezing |
going from solid to liquid | melting |
going from liquid to gas | boiling (evaporation) |
going from gas to liquid | condensation |
starting material in a chemical equation | reactants |
speeds up a chemical reaction by lowering the activation energy | catalyst |
gets made in a chemical reaction | products |
means "yields" ; shows the direction of a chemical reaction | arrow(s) |
means the reaction is reversible ; products and reactants form at the same rate | equillibrium |
states that mass is not created or destroyed in physical change or chemical reaction | law of conservation of mass |
gas is formed, precipitate is formed, color change, temperature change, odor change | clues of a chemical change |