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13 Cards in this Set
- Front
- Back
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Properties of Gases |
- are compressible - expand as the temperature is increased - have low resistance to flow (viscosity) - have lower densities than solids or liquids - mix evenly when put in the same container |
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Kinetic Molecular Theory |
a) all matter is composed in particles in continual motion b) the average kinetic energy of the particles is directly proportional to the temperature of the gas c) the greater the Ek the faster the motion of particles d) the space between the particles is very large |
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Gas and Pressure |
Gases exert pressure when they collide with objects and exert a force |
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Units of Pressure |
- Pascal (Pa) - bar - mm Hg, torr - 1 atm - kPa
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STP |
T= 0 degrees celsius, 273K P= 101.325 kPa V (molar volume)= 22.4 L/mol |
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SATP |
T= 25 degrees celsius, 298K P= 100 kPa V (molar volume)= 24.8 L/mol |
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Ideal Gas Law |
Relates the 3 variables that define the state of gas:
- pressure - volume - temperature
PV=nRT |
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What is Absolute Zero? |
273K, 0 degrees celsius. Kelvin is known as "absolute zero" |
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Conversions |
1 atm = 101.325 kPa = 760 mm Hg/torr |
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Pressure to Volume |
Boyles' Law (indirect)
P1V1 = P2VT |
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Temperature to Volume |
Charles' Law (direct)
V1/T1 = V2/T2 |
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PV = nRT |
P = pressure kPa V = volume L n = moles R = 8.314 T = temperature K |
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Moles to Volume |
Avogadro's Law
V1/n1 = V2/n2 |
