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| two or more different molecular forms of the same element in same physical state ! |
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| lack an ordered internal structure ! |
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| result of collisions of air molecules with objects ! |
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| device used to measure atmospheric pressure ! |
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| when temperature makes vapor pressure equals to external pressure ! |
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| atoms, ions, and molecules in a repeating 3D pattern; crystal lattice ! |
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| conversion occurs at the surface of an unboiling liquid ! |
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| force exerted by a gas per surface area of object ! |
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| inorganic substances that cool to a rigid state without crystalizing ! |
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| the energy an object has because of its motion ! |
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| tiny particles in all forms of matter are in constant motion ! |
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| temperature when a solid turns into a liquid ! |
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| boiling point of a liquid at a pressure of 101.3 kPa ! |
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| gives conditions of temperature and pressure at which a substance exists as a solid, liquid, and gas (vapor) ! |
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| standard atmosphere (atm) : |
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| the pressure required to support 760 mm of mercury in a mercury barometer at 25 degrees celsius ! |
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| change from a solid to a vapor without passing through the liquid state. |
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| the only set of conditions at which all three phases can exist in equilibrium with one another. |
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| smallest group of particles within a crystal that retains the geometric shape of the crystal. |
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| empty space with no particles and no pressure. |
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| liquid to a gas or vapor. |
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| vapor particles above a liquid in a sealed container collide with the container walls; dynamic equilibrium exists between the vapor and the liquid !!! |
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