ch. 3.1 - solids, liquids, & gases i. states of matter (p.68-74) kinetic molecular theory four...
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Ch. 3.1 - Solids, Liquids, & Gases
I. States of Matter (p.68-74)
Kinetic Molecular Theory
Four States of Matter
Thermal Expansion
MATTER
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A. Kinetic Molecular Theory
KMT
Tiny, constantly moving particles make up all matter.
The kinetic energy (motion) of these particles increases as temperature increases.
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B. Four States of Matter
Solids low KE - particles vibrate but
can’t move around definite shape & volume crystalline - repeating
geometric pattern amorphous - no pattern (e.g.
glass, wax)
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B. Four States of Matter
Liquids higher KE - particles can
move around but are still close together
indefinite shape definite volume
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B. Four States of Matter
Gases high KE - particles can
separate and move throughout container
indefinite shape & volume
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B. Four States of Matter
Plasma very high KE - particles collide with
enough energy to break into charged particles (+/-)
gas-like, indefiniteshape & volume
stars, fluorescentlight bulbs, TV tubes
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C. Thermal Expansion
Most matter expands when heated & contracts when cooled.
Temp causes KE. Particles collide with more force & spread out.
EX: thermostats (bimetallic strip)