Vocabulary Words
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| sublimation | an endothermic phase transition of a substance directly from the solid to the gas phase without passing through the intermediate liquid phase
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| kinetic molecular theory | several rules that describe the behavior of gases/ The nature of gas molecules was examined by scientists, such as Robert Boyle and Jacques Charles, who outlined their observations in several laws that eventually became the Kinetic Molecular Theory.
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| phase diagram | a diagram composed of equilibrium curves between different phases of the same substance
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| molar enthalpy of fusion | the amount of energy needed to change one mole of a substance from the solid phase to the liquid phase at constant temperature and pressure
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| STP | the abbreviation for Standard Temperature and Pressure. STP most commonly is used when performing calculations on gases, such as gas density. The standard temperature is 273 K (0° Celsius or 32° Fahrenheit) and the standard pressure is 1 atm pressure
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| critical point | a point on a phase diagram at which both the liquid and gas phases of a substance have the same density, and are therefore indistinguishable
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| deposition | a process where a gas changes phase and turns directly in solid without passing through the liquid phase. It's also the opposite of sublimation
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| triple point | the temperature and pressure at which the solid, liquid, and vapor phases of a pure substance can coexist in equilibrium
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| molar enthalpy of vaporization | the amount of energy needed to change one mole of a substance from the liquid phase to the gas phase at constant temperature and pressure
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| nonvolatile | the tendency of a substance to vaporize. Volatility is directly related to a substance's vapor pressure
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