Chapter 6 Study Guide Flashcards
anything that has mass and takes up space
matter
the study of matter and how is changes
chemistry
a characteristic of a substance that can be observed without changing the substance into another substance
physical property
a characteristic of a substance that describes its ability to change into other substances
chemical property
any change that alters the form or appearance of a substance but does not make the substance into another substance
physical change
a change in matter that produces one or more new substances
chemical change
the substances that undergo change in a chemical reaction
reactant
the new substances formed by the reaction
product
a solid that forms from solution during a chemical reaction
precipitate
in this type of reaction, the total making and breaking of bonds results in a net absorption of energy
endothermic reaction
in this type of reaction, the total making and breaking of bonds results in a net release of energy
exothermic reaction
a short, easy way to show a chemical reaction, using symbols instead of words
chemical equation
states that during a chemical reaction, matter is neither created nor destoryed
conservation of matter
in this type of system, matter can enter from or escape to its surroundings
open system
a system where matter isn’t allowed to enter or leave
closed system
a number placed in front of a chemical formula in an equation
coefficient
when two or more elements or compounds combine to make a more complex substance
synthesis
occurs when compounds break down into simpler products
decomposition
When one element replaces another in a compound, or when two elements in different compounds trade places
replacement
the minimum amount of energy needed to start a chemical reaction
activation energy
the amount of a substance in a given volume
concentration
a material that increases the rate of a reaction by lowering the activation energy
catalyst
biological catalysts
enzyme
a material used to decrease the rate of a reaction
inhibitor
a rapid reaction between oxygen and fuel
combustion
a material that releases energy when it burns
fuel
