Sulfur dioxide and oxygen react to form sulfur trioxide, like this: 2S09)+0(0)-

Question

Sulfur dioxide and oxygen react to form sulfur trioxide, like this: 2S09)+0(0)- 2S03(g) The reaction is exothermic. Suppose a mixture of SO2, 0, and SO, has come to equibrium 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 O to the right o to the left O (none) The temperature is The pressure of SO2 go down. raised. to the right O to the left O (none) The temperature is lowered. The pressure of SO3 will go up.

Explanation / Answer

2SO2(g) + O2(g) -------------> 2SO3(g) The forward reaction is exothermic reaction . The exothermic reaction takes place at low temperature.

perturbation                           change in composition                                         shift in equilibrium

The temperature is raised           the pressure of So2 will be go up                      to the left

The temperature is lowered          The pressure of So3 will be go Up                to the right

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