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Lecture_37_States_of_Matter - Lecture 37 States of Matter...

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Lecture 37: States of Matter States of Matter 1. All substances exist in three states of matter (phases): solid, liquid, and gas. A fourth state known  as plasma is not addressed in your textbook. These four states of matter are known as thermal  states. Two other states of matter exist: Bose-Einstein condensate (zero thermal energy, no  motion, near zero Kelvin) and filament (also non-thermal, <10 26  eV) 2. States of matter may be changed by adding or removing heat; that is, the state of matter is  determined by its energy. 3. The three states of matter have different properties; density, shape, volume, compressibility, and  thermal expansion. See summary table 1. 4. A solid is rigid, has fixed shape and volume. Liquids have definite volume but take the shape of  the container. A gas has no fixed volume or shape. A gas uniformly fills any container.
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