abeka phy sci 9 section 15.2

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chemical thermodynamics

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study this with 15.1 for the quiz tmr

12 Terms

1

chemical thermodynamics

study of relationship between chemical reactions and the laws of thermodynamics

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2

first law of thermodynamics

relates energy gained by a system to the energy lost by its surroundings

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3

exothermic

energy is released

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4

endothermic

energy is absorbed

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5

second law of thermodynamics

every chemical reaction causes a decrease in usable energy and an increase in entropy

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6

spontaneous

reaction that occurs without continuing outside help

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7

chemical kinetics

deals with rates of chemical reactions

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8

activation energy

kinetic energy that’s necessary for molecules to react

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9

catalyst

alters the rate of a chemical reaction without being permanently changed by the reaction

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10

reversible

reaction that proceeds either direction

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11

chemical equilibrium

two reactions in opposite directions occur at the same rate with no change

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12

le chatelier’s principle

system at equilibrium is disturbed, the system will react to partially offset the disturbance

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