ADVANCED MATERIAL Using Le Chatelier\'s Principle to predict the result of cha..

Question

ADVANCED MATERIAL Using Le Chatelier's Principle to predict the result of cha... Hydrogen sulfide and oxygen react to form sulfur dioxide and water, like this: 2H2S(g)+3O2(g) 2SO2(g)+ 2H20(g) Suppose a mixture of H2S, O2, SO2 and H2O has come to equilibrium in a closed reaction vessel. Predict what change, if any, the perturbations in the table below will cause in the composition of the mixture in the vessel. Also decide whether the equilibrium shifts to the right or left. perturbation change in composition shift in equilibrium to the right O to the left O (none) The pressure of H2S w ? Some o2 is removed The pressure of so2 wil? O to the right The pressure of H2S w ? to the left Some H20 is added The pressure of O2 wl ? O (none) to the right The volume of the vessel is The pressure of so2 will ? reduced to the left The pressure of H20 (none)

Explanation / Answer

According to Le chatelier's principle , any system at equillibrium , if subjected to any change in reaction conditions , will try to re-estabilish its equillibrium by shifting to either of side.

So here :

Some O2 is removed : reactant decreases , so:

The pressure of H2S will increase

The pressure of SO2 will decrease

The equillibrium will shift to left

Some H2O is added :

The pressure of H2S will increase

The pressure of O2 will increase

The equillibrium will shift to left

The volume of vessel is reduced , the pressure increases , so :

The pressure of SO2 will increase

The pressure of H2O will increase

The equillibrium will shift to right

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