How to Calculate the Partial Pressure of a Gas in a Certain Condition – Part 2

Dalton's law (aka Dalton's law of partial pressures) states that the total pressure exerted is equal to the sum of the partial pressures of the individual gases in a mixture of non-reacting ideal gases.


Partial pressures of the gases in a mixture tell us the relative number of particles or moles of the gases in that mixture.

Question:

Three 1 L flasks are connected to a 3 L flask by valves. The 3 L flask is evacuated to start with and the entire system is at 585 K. The first flask contains oxygen, the second hydrogen and the third nitrogen. The pressure of hydrogen is 1.65 atm. The amounts of gas molecules are proportional to their representations in the flasks. If valve 2 is opened first and then the rest of the valves is opened, what will the pressure be after the first valve is opened and after they all are opened? Assume the connections have negligible volume.



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Solution:



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Dandy Dalton's law❓ Let Chemaficionado know in the comments below or at mychemistryhomework@gmail.com❗

References:

(1)    Wikipedia Contributors. Dalton’s law. Wikipedia. https://en.wikipedia.org/wiki/Dalton%27s_law.

(2)    Jespersen, N. D.; Barron's Educational Series, Inc. Barron’s AP Chemistry; Barron’s Educational Series: Hauppauge, N.Y., 2012.

‌(3)    Brown, C.; Ford, M. Higher Level Chemistry, 2nd ed.; Pearson Education: Harlow, Essex, 2014.

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