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Unformatted text preview: ) So: P f = P i V i /V f = (0.5)(1)/(4) =0.125 atm ) For others: P Ne = 0.1 atm = P Ar ) Total P = sum = 0.325 ) Maybe derive total = sum? Temperature & Energy ) T is proportional to the average kinetic energy of the molecules in a gas ) Ideal gas: KE avg = (3/2)RT Temperature & Energy ) At a given T, different gases have SAME average kinetic energy ) Since KE = 1/2 mv 2 , different gases at same T have different speeds Molecular Speeds ) Average speed α (T/m) 1/2 ) Light or Hot → fast ) Heavy or Cold → slow ) Details given by MaxwellBoltzmann distribution function Speed Distributions: Effect of Mass Speed Distributions: Role of T Both curves for N 2 . One is at T = 300 K and one is at T = 1000 K. Which is which? He 1.0 L 0.50 atm Ne 1.0 L 0.40 atm Ar 2.0 L 0.20 atm ± Which gas has highest avg. KE? ± Which has highest avg. speed? All gases at T = 0 ° C...
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This note was uploaded on 03/29/2008 for the course CHEM 107 taught by Professor Generalchemforeng during the Spring '07 term at Texas A&M.
 Spring '07
 GENERALCHEMFORENG
 Mole

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