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?
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
To determine how to increase the quantity of C in the reaction, let's consider Le Chatelier's Principle, which states that when a system at equilibrium is subjected to a change, it will adjust to minimize the effect of that change.
In the given reaction:
A(g) + 2B(g) ⇌ 2C(g) + 2D(g)
To increase the quantity of C, we need to shift the equilibrium toward the products (C and D).
Now let's analyze each option to see how it affects the reaction:
a) Adding a catalyst:
A catalyst does not affect the equilibrium position of a reaction. It only increases the rate at which the reaction reaches equilibrium but doesn't affect the final amounts of products or reactants in the equilibrium mixture. So, adding a catalyst will not increase the quantity of C.
b) Decreasing the [B]:
According to Le Chatelier's Principle, if we decrease the concentration of B, the system will shift toward the side with more B to compensate for the decrease. In this case, it means the reaction will shift to the left to produce more A and B. Therefore, decreasing the concentration of B will not increase the quantity of C.
c) Increasing the pressure:
Increasing the pressure will not affect the quantity of C since both sides of the reaction have the same number of gas molecules (2C + 2D vs. A + 2B). So, increasing the pressure will not increase the quantity of C.
d) Increasing the temperature:
If we increase the temperature, the reaction will shift in the endothermic direction to consume some of the extra heat. Since ΔH is positive (endothermic), the reaction will shift to the right, favoring the production of C and D. Therefore, increasing the temperature will increase the quantity of C.
So, the correct answer is d) increasing the temperature.