C142_Lec16_Temp_Au-02

C142_Lec16_Temp_Au-02 - Lecture #16 Deviations from the...

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Deviations from the Ideal Gas Law and Chemistry in the Atmosphere Chemistry 142 B Autumn Quarter, 2004 J. B. Callis, Instructor Lecture #16
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Deviations from Ideal behavior for real gases
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The effect of intermolecular attractions on measured gas pressure.
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The effect of molecular volume on measured gas volume.
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The van der Waals equation of state is valid over a wider range of conditions than the ideal gas law: ( 29 nRT nb V V a n P = - + 2 2 Where P is the measured pressure, V is the container volume, n is the number of moles of gas and T is the temperature. a and b are the van der Waals constants, specific for each gas.
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Problem: A tank of 20.00 liters contains Chlorine gas at a temperature of 20.00 0 C at a pressure of 2.000 atm. if the tank is pressurized to a new volume of 1.000 L and a temperature of 150.00 0 C. What is the new pressure using the ideal gas equation, and the van der Waals equation? Plan:
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This note was uploaded on 07/24/2009 for the course CHEM 45434 taught by Professor Michael during the Spring '09 term at Cosumnes River College.

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C142_Lec16_Temp_Au-02 - Lecture #16 Deviations from the...

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