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The smallest arrangement of atoms in a crystal lattice that has the same symmetry as the whole crystal
Particles cannot expand to fill its container, but they can flow to adjust to the shape of its container
Attractive forces limit particles' range of motion so they remain closely packed in a fixed volume
Considered incompressible; already tightly packed, particles don't have room to compress further
Random motion of (___) particles causes (___) to mix until evenly distributed; space where (___) flows is often occupied by another (___)
In water: when molecules on the surface of the ice (solid) gain enough energy to break the hydrogen bonds apart, (this phase) is entered
Temperature at which forces holding the crystal lattice (of a crystalline solid) are broken and becomes liquid
Substance which is normally liquid at room temperature is considered a (___) when it's in its gas phase
Temperature at which vapor pressure of a liquid equals the external or atmospheric pressure
In water: formation of hydrogen bond releases thermal energy and indicates change from vapor to the liquid phase. (Which phase change?)
Process by which a substance changes from a gas or vapor to a solid without first becoming a liquid; energy is released
Molecules with a higher-than-average kinetic energy escape from the surface of a liquid (what phase change?)
Heat of fusion
Amount of energy it takes to turn solid into a liquid (energy involved for phase change)
Heat of vaporization
Amount of energy it takes to turn gas to liquid, or liquid to gas (energy involved for phase change)
Strong attractive forces acting between particles
(Why do) solids have a definite volume and a definite shape
No significant forces of attraction between gas particles
(Why do) gases have an indefinite volume and an indefinite shape
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