Question

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?

Answer 1

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.

Answer 2

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.

Answer 3

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.

Answer 4

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