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18 August, 20:24

Equal moles of H2, N2, O2, and He are placed into separate containers at the same temperature. Assuming each gas behaves ideally, which container has the highest pressure? They would all exhibit the same pressure. O2 H2 He N2

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  1. 18 August, 20:28
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    They would all exhibit the same pressure.

    Explanation:

    Since the same number of mole of each gas is placed in different containers, it means the gas will occupy the same volume.

    Now, the gases were observed at the same temperature. This means they will all have the same pressure as their volume is the same.

    Now we can further understand this by doing a simple calculation as follow:

    Assumptions:

    For H2:

    Number of mole (n) = 1 mole

    Volume (V) = 22.4L

    Temperature (T) = 298K

    Gas constant (R) = 0.0821 atm. L/Kmol

    Pressure = ... ?

    PV = nRT

    Divide both side V

    P = nRT / V

    P = 1 x 0.0821 x 298 / 22.4

    P = 1 atm

    Therefore, H2 has a pressure of 1 atm.

    For N2:

    Number of mole (n) = 1 mole

    Volume (V) = 22.4L

    Temperature (T) = 298K

    Gas constant (R) = 0.0821 atm. L/Kmol

    Pressure = ... ?

    PV = nRT

    Divide both side V

    P = nRT / V

    P = 1 x 0.0821 x 298 / 22.4

    P = 1 atm

    Therefore, N2 has a pressure of 1 atm

    For O2:

    Number of mole (n) = 1 mole

    Volume (V) = 22.4L

    Temperature (T) = 298K

    Gas constant (R) = 0.0821 atm. L/Kmol

    Pressure = ... ?

    PV = nRT

    Divide both side V

    P = nRT / V

    P = 1 x 0.0821 x 298 / 22.4

    P = 1 atm

    Therefore, O2 has a pressure of 1 atm

    For He:

    Number of mole (n) = 1 mole

    Volume (V) = 22.4L

    Temperature (T) = 298K

    Gas constant (R) = 0.0821 atm. L/Kmol

    Pressure = ... ?

    PV = nRT

    Divide both side V

    P = nRT / V

    P = 1 x 0.0821 x 298 / 22.4

    P = 1 atm

    Therefore, He has a pressure of 1 atm.

    From the above illustrations we can see that the gases have the same pressure since they have the same number of mole, volume and were observed at the same temperature.
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