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20 August, 22:53

A 2.50 L sample of a gas at 1.00 atm is subjected to 1.25 atm of pressure at constant temperature. What is the new volume of the gas?

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  1. 21 August, 00:47
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    2.0 L.

    Explanation:

    We can use the general law of ideal gas: PV = nRT.

    where, P is the pressure of the gas in atm.

    V is the volume of the gas in L.

    n is the no. of moles of the gas in mol.

    R is the general gas constant,

    T is the temperature of the gas in K.

    If n and T are constant, and have two different values of V and P:

    P₁V₁ = P₂V₂

    P₁ = 1.0 atm, V₁ = 2.5 L.

    P₂ = 1,25 atm, V₂ = ? L.

    ∴ V₂ = P₁V₁/P₂ = (1.0 atm) (2.5 L) / (1.25 atm) = 2.0 L.
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