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16 Cards in this Set
- Front
- Back
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What is pressure in the kinetic model of an ideal gas?
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Molecules rebounding off the walls of a container.
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Units for Pressure
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1 ATM = 100K Pascal = 760 Torr, ~760 mm Hg @ sealevel
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Boyles Law (Memory hook: Vice President)
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V = 1 / P
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Charle's Law (Memory Hook: television)
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T = V
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Avagadro's Principle
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Total Volume = n*Vm
n = moles Vm = molar volume (depends on P, T) |
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Ideal Gas Law
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PV = nRT
R = 8.314 J / (mol K) |
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Star Wars equation (Highly technical term)
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P1 V1 = P2 V2
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STP
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25 C @ 1ATM
Vm = 24.5 L / mol |
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Effusion
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Escape of a gas through small hole into a vacuum
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Relation between the rate of effusion of two gases (A and B):
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(dA / dT) / (dB / dT) = sqrt[ M(b) / M(a) ]
M = mass of a mol of the gas |
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Rate of effusion of one gas between two different temperatures:
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Let our two temperatures = T1 and T2
(dA / dT) / (dA / dT) = sqrt[ T1 / T2 ] |
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Temperature
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The measure of the average kinetic energy of the particles in a gas.
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Root Mean Square Velocity
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Vrms ~ sqrt (T / M)
Vrms = sqrt (3RT / M) |
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Rate of Effusion
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dA / dT ~ sqrt(T / M)
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Free mean path (L)
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Average distance between collision
L = 1 / [d^2 *(N/V)*pi*sqrt(2)] N = n*Avogadro's Number |
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Van Der Waals Equation
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(P + a (n^2 / V^2)) (V - nb) = nRT
a, b are parameters that describe the behaviours of a given gas. "a" captures attraction. increases with n, decreases with V "b" captures size and repulsion. repulsion increases with n |
