abeka phy sci 9 section 15.2

study this with 15.1 for the quiz tmr

chemical thermodynamics

study of relationship between chemical reactions and the laws of thermodynamics

first law of thermodynamics

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

exothermic

energy is released

endothermic

energy is absorbed

second law of thermodynamics

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

spontaneous

reaction that occurs without continuing outside help

chemical kinetics

deals with rates of chemical reactions

activation energy

kinetic energy that’s necessary for molecules to react

catalyst

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

reversible

reaction that proceeds either direction

chemical equilibrium

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

le chatelier’s principle

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