The volume of a gas varies directly with its temperature and inversely with the pressure. If the volume of a certain gas is
20 cubic feet at a temperature of
350K and a pressure of 35
pounds per square inch, what is the volume of the same gas at 330
K when the pressure is 30
pounds per square inch?

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  1. V = kt/p
    for the given data:
    20 = k(350)/35
    k = 20(35)/350 = 2

    V = 2t/p

    when t=330, p=30
    V = 2(330)/30 = 22

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  2. PV=kT, so PV/T=k is constant. o, you need V such that

    30V/330 = 35*20/350
    V/11 = 2
    V = 22

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