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BJU Physical Sci 7
BJU Physical Science - Ch 7 6th edition
| Term | Definition |
|---|---|
| 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. |
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