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30 Cards in this Set
- Front
- Back
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When they ask for the final temperature of the water, what do you do?
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you multiply the gram and the specific heat of water (4.2) and you divide that number from the number of joules. Finally*, you add the answer to the initial temperature given.
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The number of calories (joules) absorbed in raising the temperature of water is absorbed by...
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multiplying the mass, the temperature change, and the heat capacity of water.
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Heat of fusion
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the amount of energy required to convert a unit mass of solid to liquid at constant temperature
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Which of the gases take the shape and completely fill the volume of any container in which it is place?
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gas
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Standard temperature and pressure are
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Temperature = 0 degress Celsius
Pressure= 101.3 kilopascal |
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The kinetic molecular theory assumes that the particles of ideal gases are
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random, constant, straight-line motion, having no volume, and no attractive forces between the particles
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The volume of a gas is directly related to the...
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absolute temperature, which is expressed in Kelvin
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Compared to the Celsius temperature, Kelvin temperature will always be
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273 degrees greater
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The behavior of real gases most closely resembles the ideals gases in conditions of...
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high temperature and low pressure
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As temperature increases, the volume
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increases!
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Formula for Kelvin
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K= C + 273
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When the potential energy is increasing, the molecules...
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move apart
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Which element has the smallest mass and volume and have the most similar properties to those of an ideal gas?
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hydrogen (H2)
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What is the main difference between ideal and real gases?
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Real gases have some force of attraction but ideal gases don't.
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During the phase from solid to liquid, the substance
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absorbs heat energy
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Describe the relationship between pressure and volume in a *ideal gas.
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inverse relationship
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Heat flows from
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warm to cooler areas
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*Important Fact to know about gas
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Gas had no definite shape or volume. It completely fills its container.
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Absolute zero=?
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0 Kelvin
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As the temperature of a substance decreases, the average kinetic energy...
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decreases
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Potential energy rises in heating curve or cooling curve?
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it rises in heating curve and falls in cooling curve
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Kinetic energy rises in heating curve or cooling curve?
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it rises in heating curve and falls in cooling curve
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Ideal gas
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-gases particle size negligible
-particles move in randomly in straight lines -no attractive forces between particles -no energy (elastic) |
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Which elements are most ideal gases?
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Helium & Hydrogen
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Boyles Law Formula
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P1V1 = P2V2
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Charles law
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V1/T1 = V2/T2
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Melting point and Boiling point of celsius and kelvin
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Celsius:
-Boiling point: 100 Celsius -Melting point: 0 Celsius Kelvin -Boiling point: 373 K -Melting point: 273 K |
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When are the gases most ideal?
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when the particles are further apart; (high temp. /low pressure)
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Chromatography
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uses a moving phase which separates by rate of movement
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Value of R in the Ideal Gas Law
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.0821
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