Chemistry states od matter
Terms
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- Solid
- definite state and volume
- Liquid
- deifinite colume but indefinite shape, takes shape of its container
- Gas
- neither definite volume nor definite shape
- Plasma
-
superheated gas
high-temperature physical state of matter in which atms lose most of teir electron, particles that make up atoms. (found in fluorescent light bulbs) - Melting
- change from sold to liquid
- Boiling
- change from liquid to gas
- Freezing
- change from liquid to solid
- Chemical Property
- relates to a substance's ability to undergo changes hat transforms i into differet substances
- Chemical change or reaction
- a change in which one or more substances are converted into different substances
- Reactants
- substaces that react in a chemical change
- Products
- substances that are formed by the chemical cahnges.
- Mixtures
- a blend of two or more diferent kinds of matter. each with its own idenity and properties an can usually be separated.
- Homogenous or solution
- uniform in composition
- Heterogenous
- not uniform throughout
- Physical poroperties- separation of mictures
- magnestism, filtration, chromatography, centrifuge, vaporization, density
- Pure Substances
-
have fixed composition and is different from a mixture. 1. Every sample has exactly the same characteristic properties
2. Every sample of a given pure substance has exactly the same compostion
Elements/Compounds - Impuriies
- present in all lab chemicals
- Endothermic
- gets colder releases/loses heat
- Exothermic
- gets warmer absorobs heat
- Evidence for a chemical change
-
1. color change
2. bublling/steaming - gas is involved
3. evolution of light
4. heat
5. formation of a precipitate (solid usually)