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RSM Chp. Six

matter jis anything that mass and takes up space
chemistry the study of matter and how matter changes
physical property is a characteristic of a substance that can be observed without changing the substance into another substance
chemical property is a characteristic of a substance that describes its ability to change into other substances.
physical change is any change that alters the form or appearance of a substance but does make the substance into another substance
chemical change a change in matter that produces one of more new substances
reactant the substances that undergo change in a chemical reaction
product the substances formed by the reaction
precipitate is a solid that forms from solutin during a chemical reaction
endothermic reaction the total making and breaking of bonds results in a net absorption of energy. the energy is absorbed as heat from nearby matter, which cools
exothermic reaction the total making breaking of bonds results in a net release of energy The energy is released as heat into nearby matter
chemical equation is a short, easy way to show a chemical reaction using symbols instead of words
conservation of matter during a chemical reaction, matter is neither created nor destroyed. the total mass of the reactants must equal the total mass of the products
open system matter can enter from or escape to the surroundings.
closed system matter is allowed to enter or leave
coeffiecient is a number placed in front of a chemical formula in an equation
synthesis when two or more elements or compound combine to make a more complex substance
decomposition occurs when compounds break down into simpler products
replacement when one element replaces another in a compound or when two elements in different compounds trade places
activation energy is the minimum amount of energy needed to start a chemical energy
concentration is the amount of a substance in a given volume
catalyst is a materical that increases the rate of a reactin by lowering the activation energy
enzyme the cells in your body (all living things) contain biological catalysts
inhibitor a material used to decrease the rate of a reaction
combustion a rapid reatction between oxygen and a fuel
fuel is a material that releases energy when it burns
Created by: gayledains