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9 September, 09:31

A sample of 0.0200 mol of chlorine gas is kept at 27.0°c and 0.150 atm. what would be its pressure if the temperature was increased to 227.°c and the volume kept the same

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  1. 9 September, 09:38
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    Answer is: 0,250 atm.

    T₁ (chlorine) = 27°C = 300K.

    T₂ (chlorine) = 227°C = 500K.

    T₂/T₁ = 1,66.

    p1 (chlorine) = 0,150 atm.

    p2 (chlorine) = ?

    V (chlorine) = constant.

    n (chlorine) = 0,0200 mol.

    R - gas constant, R = 0.0821 atm·l/mol·K.

    Ideal gas law: p·V = n·R·T.

    p = n·R·T:V.

    If temperature was increased 1,66 times, pressure also increase 1,66 times: 1,66·0,150 atm = 0,250 atm.
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