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15 June, 14:21

The temperature of 200 mL of gas

originally at STP is changed to - 25 Celsius at constant volume. Calculate the final pressure of the gas in torr

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Answers (1)
  1. 15 June, 16:20
    0
    691.6 torr

    Explanation:

    Given dа ta:

    Initial temperature = 273 K

    Initial pressure = 1 atm

    Final temperature = - 25 °C (-25 + 273 = 248 k)

    Final pressure = ?

    Solution:

    P₁/T₁ = P₂/T₂

    P₁ = Initial pressure

    T₁ = Initial temperature

    P₂ = Final pressure

    T₂ = Final temperature

    Now we will put the values in formula.

    P₁/T₁ = P₂/T₂

    P₂ = P₁T₂/T₁

    P₂ = 1 atm * 248 K / 273 k

    P₂ = 248 atm. K / 273 K

    P₂ = 0.91 atm

    In torr:

    0.91 * 760 = 691.6 torr
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