chem: volume, pressure, temp (@SATP) question...?

"the air in a 2.75L balloon at a temperature of 10*C exerts a pressure of 125 kPa. determine the new volume of the balloon at SATP."

That's the question, but I feel it's missing something... please help solve! (the answer is supposed to be 3.62L)

1 Answer

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  • Lexi R
    Lv 7
    9 years ago
    Favorite Answer

    SATP is standard ambient temperature and pressure

    which is 25 deg celcius (298.15 Kelvin)

    and 100.0 kPa

    http://en.wikipedia.org/wiki/Standard_conditions_f...

    Use the combined gas equation

    P1V1 / T1 = P2V2 / T2

    P1 = 125 kPa

    V1 = 2.75 L

    T1 = 10 deg C = 283.15 K

    P2 = 100.0 kPa

    V2 = ? L

    T2 = 298.15 K

    V2 = P1V1T2 / (P2T1)

    = 125 kPa x 2.75 L x 298.15 K / (100.0 kPa x 283.15 K)

    = 3.62385 L

    = 3.62 L (3 sig figs)

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