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BJU Physical Sci 7

BJU Physical Science - Ch 7 6th edition

TermDefinition
chemical equations A combination of chemical formulas and symbols that models a chemical reaction.
chemical equilibrium The state that occurs when forward and reverse reactions each happen at the same rate.
chemical reaction A process that rearranges the atoms in one or more substances into one or more new substances.
coefficient A number placed in front of a chemical formula within a chemical equation that shows how many units of a reactant or product are needed to balance the chemical equation.
collision model The model that states that for a reaction to occur, the reactant particles must collide with each other, with the proper alignment, and with enough energy.
combustion An exothermic chemical reaction in which a fuel reacts with oxygen.
decomposition reaction A chemical reaction in which a single reactant breaks down into two or more products.
double-replacement reactions A chemical reaction in which two ionic compounds swap cations or anions with each other; also known as double-displacement reaction.
endothermic reactions A chemical reaction that absorbs more thermal energy than it releases.
exothermic reactions A chemical reaction that releases more thermal energy than it absorbs.
inhibitor A substance that slows the rate of a reaction by reducing the effectiveness of catalysts.
law of conservation of energy The law that states that energy cannot be created or destroyed but only transferred between objects or transformed; also known as the first law of thermodynamics.
LeChatelier's principle The principle that states that a chemical system in equilibrium will adjust its equilibrium position in such a way as to reduce the effect of any changes made to the system.
molar mass The mass of one mole of a substance.
mole SI fundamental unit for the quantity of matter in a substance; a count equal to 6.022 x 10 to the 23rd power.
oxidation A loss of electrons in a chemical reaction.
product A substance that is formed during a chemical reaction.
reactant A substance that enters into a chemical reaction.
reaction rate The speed of reaction.
reduction A gain of electrons in a chemical reaction.
reversible reaction A reaction in which the products can react together to re-form the original reactants.
single-replacement reactions A chemical reaction in which one element in a compound is replaced by another element; also known as a single-displacement reaction.
synthesis reaction A chemical reaction in which two or more reactants combine into a single, more complex product.
Created by: marchscience
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