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April 16, 2014

Homework Help: Chemistry

Posted by Abbagail on Friday, April 6, 2012 at 1:31pm.

Sulfur trioxide gas, one of the causes of acid rain, is produced in the upper atmosphere when oxygen reacts with sulfur dioxide gas in the reaction shown below:

2SO2(g) + O2(g) <--> 2SO3(g) deltaH0 = -197kJ

The gases are placed in a reaction vessel and allowed to come to equilibrium at temperature T, pressure P, and volume V. Predict and explain the effects that each of the following will have on the equilibrium composition of the reaction:

1. The partial pressure of SO3(g) is increased by the addition of SO3(g).
2. The pressure in the vessel is increased by the addition of He.
3. The total pressure in the vessel is increased by decreasing the volume of the vessel.
4. The temperature of the system is decreased.
5. The partial pressure of O2(g) is decreased.

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