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One mole of oxygen gas is at a pressure of 5.10 atm and a temperature of 32.0°C.
(a) If the gas is heated at constant volume until the pressure triples, what is the final temperature?

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    P V = n R T

    V, n and R are constant in this case.

    If the pressure P triples at constant volume, so does the absolute termperature, T. It goes from 305 K to 915 K. Convert that back to C, if you wish.

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