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IGHS Winkels

Physical Science Chapter 7

TermDefinition
Reactants the substances that undergo change in a chemical reaction
Products the new substances formed as a result of a reactant change
Chemical equation a representation of a chemical reaction in which the reactants and products are expressed as formulas
Coefficients numbers that appear before the formulas in a chemical equation
Mole an amount of a substance that contains appproximately 6.02 x 10 to the 23rd power particles of that substance
Molar mass the mass of one mole of a substance
Synthesis reaction a reaction in which two or more substances react to form a single substance
Decomposition reaction a reaction in which a compound breaks down into two or more simpler substances
Synthesis reaction a reaction in which two or more substances react to form a single substance
Decomposition reaction a reaction in which a compound breaks down into two or more simpler substances
Single-replacement reaction a reaction in which one element takes the place of another element in a compound
Double-replacement reaction one in which two different compounds exchange positive ions and form two new compounds
Combustion reaction one in which a substance reacts rapidly with oxygen often producing heat and light
Chemical energy the energy stored in the chemical bonds of a substance
Exothermic reaction a chemical reaction that releases energy to its surroundings
Endothermic reaction a chemical reaction that absorbs energy from its surroundings
Reaction rate the rate at which reactants change into products over time
Catalyst a substance that affects the reaction rate without being used up in the reaction
Equilibrum a state in which the forward and reverse paths of a change take place at the same rate
Reversible reaction a reaction in which the conversion of reactants into products and the conversion of products into reactants can happen simultaneously
Created by: Winkels