ACCTG418 Chapter Notes -Mean Free Path, Root Mean Square
6 Mar 2014
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Gases have greater average speeds at higher temperatures. Lighter gases have greater average speeds than heavier gases. Calculation for the ratio of speeds for hydrogen vs oxygen speeds. urms h2 urms o2. If a poisonous gas is released in the room it will take some time for it to spread across the entire room. Mean free path = average distance a gas molecule travels between collisions. At the same temperature, h2 has a speed that is 4 times greater than that of o2. Collisions greater time will elapse before homogeneous spreading of the gas. Diffusion passage of a gas through a pinhole into. Solutions more complex requiring calculus (left for 3rd year physical chem. ) Effusion rate is directly proportional to the root mean velocity. Reff (gas 2) = urms (gas 1) urms (gas 2) = Rates are inversely proportional to the molar masses (plus a square root factor) No seating @ some top rows of the theatre.
