Molar kinetic energy is also proportional to velocity (u)
Gas Laws 5 6.18 Root Mean Square Velocity, u rms R = 8.3145 J/K·mol (J = joule = kg·m 2 /s 2 ) T = temperature of gas (in K) MM = mass of a mole of gas in kg Final units are in m/s. 6.19 Diffusion vs. Effusion x Diffusion – x Effusion – x Rate of effusion 6.20 Graham’s Law of Effusion 6.21 Real Gases x Gases are mostly ideal when they have 6.22 Real Gases (van der Waals Equation) 6.23 Values of the van der Waals Constants for Some Gases x Value of a reflects how much of a correction must be made to adjust x Low value for a reflects weak intermolecular forces among the gas molecules x Values of b 6.24 Why gases more ideal at Low pressure
Gas Laws 6 High temperature Air Composition Primary vs. Secondary Pollutants x Primary pollutants: Ex: CO, SO 2 , PM’s, volatile organic compounds (VOC) x Secondary Pollutants: Ex: O 3 , SO 3 , etc . . . Combustion as a Source of Pollutants x Two main sources: Transportation and Production of electricity x Combustion of petroleum produces CO, CO 2 , NO, and NO 2 , along with unburned molecules from petroleum.
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- Fall '08