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May 22, 2015

Homework Help: AP Chemistry

Posted by S on Saturday, January 12, 2008 at 10:45pm.

For the system 2SO2(g) + O2(g) <--> 2SO3 (g), change in enthalpy is negative for the production of SO3. At a particular temperature, 8.00 moles of sulfur dioxide and 10.00 moles of sulfur trioxide are introduced into a 2.00 L container. The system is allowed to reach equilibrium. The value of the equilibrium constant for this reaction is 3.40.

a) Calculate the concentrations of all species at equilibrium.

b) Predict the effect of the following changes on the value of the equilibrium constant and on the number of moles of sulfur trioxide present in the mixture at equilibrium. (assume that in each cause all other factors remain constant).
i) decreasing the volume of the system
ii) adding oxygen to the equilibrium mixture
iii) raising the temperature of the system

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