Chapter 7 Vocab

1. reaction a chemical reaction that releases energy by light or heat
3. reaction chemical reaction that involves a transfer of electrons between two species.
5. reaction one of the major classes of chemical reactions
6. reaction a reaction in which a compound breaks down into two or more simpler substances.
8. a substance that takes part in and undergoes change during a reaction.
9. energy the energy stored in the bonds of chemical compound
11. a thing or person that is the result of an action or process.
12. reaction any chemical reaction that absorbs heat from its environment.
13. reaction a reaction in which the positive and negative ions of two ionic compounds exchange places to form two new compounds.
14. reaction a reaction in which a substance reacts with oxygen gas, releasing energy in the form of light and heat

2. a multiplier or factor that measures some property.
4. equation a representation of a chemical reaction using symbols of the elements to indicate the amount of substance
7. reaction a reaction in which one element replaces a similar element in a compound
10. the amount of substance of a system which contains as many elementary entities as there are atoms in 0.012 kilogram of carbon-12.
15. mass the ratio between the mass and the amount of substance (measured in moles) of any sample