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20 Cards in this Set
- Front
- Back
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Pressure equals
Pressure unit |
force/ area
Pascal |
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Definition: atmospheric pressure
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the pressure exerted by earth's atmosphere
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Definition: barometer
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instrument that measures atmospheric pressure
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Pressure conversions:
torr mmHG Pa and atm |
1 torr= 1mmHg
1 atm= 760mmHg 1 atm= 101,325 Pa |
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Definition: manometer
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instrument used to measure pressure of gases other than the atmosphere
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Definition: Boyle's law
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P1V1=P2V2
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Definition: Charles' law
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V1/T1= V2/T2
P1/T1=P2/T2 *when T is in degrees K |
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Definition: Avogadro's law
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Volume is directly proportional to to the number of moles of the gas present
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Definition: Ideal Gas Equation
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PV=nRT
Volume in Liters, Pressure in atm, temperature in K |
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Definition: R
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Gas constant= .0821
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Definition: STP
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Standard temperature and pressure = 0 degrees C and 1 atm
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At STP one mole of an ideal gas has a volume of...
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22.4 L
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Definition: Ideal Gas Equation for problems with change
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P1V1/ n1T1= P2V2/n2T2
or P1V1/ T1= P2V2/T2 when moles of gas do not change |
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Density of a gas=
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Pressure*Molar Mass/ R*Temperature
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Molar mass of a gaseous substance
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M= dRT/P
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Strategy for Gas Stoichiometry problems
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1)determine Amount of reactant (grams or volume)
2) Calculate Moles of reactant 3)calculate Moles of Product 4)calculate Amount of product |
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definition: partial pressures
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the pressures of individual gas components on the mixture
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definition: Dalton's law of partial pressures
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the total pressure is the sum of the pressures of the components
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definition: mole fraction
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expresses the ratio of of the number of moles of one component to the number of moles in the whole (xi= ni/nt
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What is the partial pressure of a component as related to the total pressure
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pi= XiPt, where X is the mole fraction of the component
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