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B&W Chem Interaction

PH review chapter 1

QuestionAnswer
Anything that has mass and occupies space. Matter
The study of the properties of matter and how matter changes. Chemistry
Any characteristic of a substance that can be observed or measured without changing the composition of the substance. Physical Property
Any property of a substance that produces a change in the composition of matter. Chemical Property
The process in which substances undergo chemical changes that result in the formation of new substances. Chemical Reaction
A change that alters the form or appearance of a material but does not make the material into another substance. Physical Change
A solid that forms from a solution during a chemical reaction. Precipitate
A reaction that absorbs energy in the form of heat. Endothermic Reaction
A reaction that releases energy in the form of heat. Exothermic Reaction
A short, easy way to show a chemical reaction, using symbols. Chemical Equation
A substance that enters into a chemical reaction. Reactant
A substance formed as a result of a chemical reaction. Product
The principle stating that matter is not created or destroyed during a chemical reaction. Conservation of Mass
A system in which no matter is allowed to enter or leave. Closed system
A system in which matter can enter from or escape to the surroundings. Open system
A number in front of a chemical formula in an equation that indicates how many molecules or atoms of each reactant and product are involved in a reaction. Coefficient
A chemical reaction in which two or more simple substances combine to form a new, more complex substance. Synthesis
A chemical reaction that breaks down compounds into simpler products. Decomposition
A reaction in which one element replaces another in a compound, or when two elements in different compounds trade places. Replacement
The minimum amount of energy needed to get a chemical reaction started. Activation energy
The amount of one material in a certain volume of another material. Concentration
A material that increases the rate of a reaction by lowering the activation energy. Catalyst
A protein that speeds up chemical reactions in the body. Enzyme
A material that decreases the rate of a reaction. Inhibitor
The process of burning a fuel. Combustion
A substance that provides energy as the result of a chemical change. Fuel
Created by: bwise
 

 



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