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16 October, 00:45

Consider a balloon with volume V. It contains n moles of gas and has an internal pressure of P. The temperature of the gas is T. The balloon is placed in a freezer at temperature 0.75T. The freezer is pressurized at 1.25P. Which of these could be the final volume of the balloon?

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  1. 16 October, 02:24
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    V₂ = 0.6 V.

    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 is constant, and have different values of P, V and T:

    (P₁V₁T₂) = (P₂V₂T₁).

    V₁ = V, P₁ = P, T₁ = T.

    V₂ = ? V, P₂ = 1.25 P, T₂ = 0.75 T.

    ∴ V₂ = (P₁V₁T₂) / (P₂T₁) = (P) (V) (0.75 T) / (1.25 P) (T) = 0.6 V.
  2. 16 October, 03:53
    0
    Explanation:Consider a balloon with volume V. It contains n moles of gas and has an internal pressure of P. The temperature of the gas is T. The balloon is placed in a freezer at temperature 0.75T. The freezer is pressurized at 1.25P. Which of these could be the final volume of the balloon?
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