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Lv 7
? asked in Science & MathematicsChemistry · 8 years ago

Ideal gas law question. How do I do this problem?

http://www.chegg.com/homework-help/questions-and-a...

Part b was simple enough for me: P1T2 = P2T1

I don't know how to get part a.

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  • Doctorwho
    Lv 7
    8 years ago
    Favorite Answer

    We need to know the volume of the apparatus. The number of moles can't be calculated from the temperature and pressure alone.

    We could express n generically:

    PV= nRT

    n = PV/RT

    We could then substitute the known values for P, R, and T and have n = a*V where a is the constant formed from the numerical evaluation of PV/T.

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