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8 January, 18:27

A hot air balloon is filled with 15 moles helium gas and 5 moles nitrogen gas. What is the volume of the balloon at 1.01 atm and 300 K?

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  1. 8 January, 18:42
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    Given:

    Moles of He = 15

    Moles of N2 = 5

    Pressure (P) = 1.01 atm

    Temperature (T) = 300 K

    To determine:

    The volume (V) of the balloon

    Explanation:

    From the ideal gas law:

    PV = nRT

    where P = pressure of the gas

    V = volume

    n = number of moles of the gas

    T = temperature

    R = gas constant = 0.0821 L-atm/mol-K

    In this case we have:-

    n (total) = 15 + 5 = 20 moles

    P = 1.01 atm and T = 300K

    V = nRT/P = 20 moles * 0.0821 L-atm/mol-K * 300 K/1.01 atm = 487.7 L

    Ans: Volume of the balloon is around 488 L
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