In a mixture of hydrogen and nitrogen gases, the mole fraction of nitrogen is 0.333. If the partial pressure of hydrogen in the mixture is 7

Question

In a mixture of hydrogen and nitrogen gases, the mole fraction of nitrogen is 0.333. If the partial pressure of hydrogen in the mixture is 75.0 torr, what is the total pressure of the mixture

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Bình An 1 day 2021-07-22T06:37:27+00:00 1 Answers 0 views 0

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    2021-07-22T06:39:24+00:00

    Answer:

    P_T=112.4torr

    Explanation:

    Hello there!

    In this case, since these problems about gas mixtures are based off Dalton’s law in terms of mole fraction, partial pressure and total pressure, we can write the following for hydrogen, we are given its partial pressure:

    P_{H_2}=x_{H_2}*P_T

    And can be solved for the total pressure as follows:

    P_T=\frac{P_{H_2}}{x_{H_2}}

    However, we first calculate the mole fraction of hydrogen by subtracting that of nitrogen to 1 due to:

    x_{H_2}+x_{N_2}=1\\\\x_{H_2}=1-0.333=0.667

    Then, we can plug in to obtain the total pressure:

    P_T=\frac{75.0torr}{0.667}\\\\P_T=112.4torr

    Regards!

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