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BBFan88 asked in Science & MathematicsChemistry · 1 decade ago

Calculate Equilibrium Pressures Hydrogen Iodide Synthesis Without Temperature?

Assume that gaseous hydrogen iodide is synthesized from hydrogen gas and iodine vapor at a temperature where the equilibrium constant is 1.00 * 10^2. Suppose HI at 5.000 * 10^-1 atm, H2 at 1.000 * 10^-2 atm, and I2 at 5.000 * 10^-3 atm are mixed in a 5.000-L flask.

Calculate the equilibrium pressures of all species.

How would you solve this problem?

Update:

Is that equilibrium constant not Kc? I'm confused about Kp vs. Kc.

1 Answer

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  • 1 decade ago
    Favorite Answer

    Use the standard RICE procedure, with pressures instead of concentrations.

    The constant you are using is, presumably, Kp, as usual for reactions involving gases, so the relationship between pressure and conceratin doesn't matter.

    Advanced question for you; in this particular case it doesn't matter if it's Kp or Kc. Why not?

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