In the system A(g) + 2B(g)  2C(g) + 2D(g) H=21 kJ/mol, it is possible to increase the quantity of C by:

a) adding a catalyst
b) decreasing the [B]
c) increasing the pressure
d) increasing the temperature

- I think it is b ? Am i right?

4 answers

Remember the other post.
If you want C to increase you must make the rxn shift to the right. Increase A will do that, increase B will do that, decrease D will do that, decreasing the temperature will do that. Increasing pressure shifts the rxn to the side with fewer mols and that is the left side so that decreases C.
B is reactant.so if you want to increase the C then you have to increase the B.
i think you can also do this by increasing temp. which gives d energy to molecules to react.
kuldeep is right with increasing B to increase C but wrong about the T. Increasing T will drive the reaction to the left which decreases C.
I think kuldeep is right because this is an endothermic reaction and if I want to make the rxn shift to the right, increasing the temp with an endo. reaction will shift right
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