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chem U8

kinetic theory, phases

QuestionAnswer
kinetic theory tiny particles in all forms of matter are in constant motion
how does a gas move? moves in a straight line until a collision occurs
what about the forces of an air molecule? travels at 1000mph, has no attractive or repulsive forces, or else they would become a shape/form
what does elastic collisions mean? that when gas particles bounce off of something, they don't gain or lose energy
what does a barometer measure? atmospheric pressure at sea level
Heat is? the total kinetic energy
Temperature is? the average kinetic energy
absolute zero the temperature at which all motion stops (theoretical), defined as 0 Kelvin.
characteristic of a solid ordered, crystalline pattern, with the exception of glass, rubber, and plastic (amorphus), don't compress, the most dense phase
allotropes molecules that have more than one crystal pattern (diamonds, graphite)
characteristics of liquids take the shape of the container they're in, don't compress, some attractive forces
critical pt (at the top) gas cannot be liquefied no matter how much pressure is applied
triple pt temperature and pressure where all 3 phases exist in equilibrium
melting is when the substance is... solid and liquid
sublimation is when the substance is... both a solid and a gas (skip liquid phase)
vaporization the conversion of liquid to a gas (at the boiling point)
evaporation the conversation of liquid to a gas below the boiling point
3 ways to increase mvmt of air particles increase air currents, increase SA, increase heat; particles near the top AND heading towards the top escape first
Created by: allyson.lee
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