How to Calculate the Partial Pressure of a Gas in a Certain Condition – Part 1

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:

N2(g) & H2(g) are added to a previously evacuated container and react at a constant temperature according to the following chemical equation:

N2(g) + 3H2(g) → 2NH3(g)

If the initial pressure of N2(g) was 1.2 atm, and that of H2(g) was 3.8 atm, what is the partial pressure of NH3(g) when the partial pressure of N2(g) has decreased to 0.9 atm?

Solution:



Click/tap to enlarge the image

Got the pressure relieved❓ Let Chemaficionado know in the comments below or at mychemistryhomework@gmail.com❗

Reference:

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

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