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H2(g) + F2(g) 2HF(g)
 vessel, containing an equilbrium mixture of these gases, is pressurized by adding helium gas, the equilibrium position will shift to the left.    


Feb 3rd, 2015

Pressure only has an effect on the equilibrium of gasses if there are an unequal number of molecules on one side.  Since there are two molecules of each side of the equation, there will be no shift in the equilibrium.

In an equation that has a different number of molecules on each side, an increase in pressure would favor the side with the fewest number of molecules.

Feb 3rd, 2015

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Feb 3rd, 2015
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Feb 3rd, 2015
Sep 25th, 2017
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