Match the effects on the concentration of so3 gas when the following changes occur after initial equilibrium has been established in this system (n. c. = no change). 2so2(g) + o2(g) 2so3(g) + 46.8 kcal pressure increases increase [o2] increase volume of chamber adding a catalyst raising the temperature

The effects on the concentration of SO3 gas when the following changes occur after initial equilibrium has been established in this system (N.C. = no change) by adding a catalyst.

2SO2(g) + O2(g)  2SO3(g) + 46.8 kcal

So that even though there is an addition of catalyst, no change in reactants or products has occurred because catalyst only provides a faster pathway for the reaction to occur.

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