Question

According to Le Chätelier's principle, for the equilibrium reaction A(g) "equilibrium arrow" 2B(g) ,what will the response of the system be if we:

1.removed B from the system?

2.increased the temperature of the system?

3.added an inert gas (such as nitrogen gas)?

Answer 1

1) if we remove B from the system, the equilibrium tends to shift to the right so as to increase number of moles of B produced to counter the change

2) If the reaction is exothermic, the backward reaction is preferred in order to counter the excessive heat produced. If the reaction is endothermic, the forward reaction is preferred.

3) if volume is constant, system doesn't respond to the addition of inert gas.

If pressure is constant, volume of the system increases and the number of moles per unit volume decreases. Thus, the reaction moves in a direction so as to increase the number of moles per unit volume. Thus, forward reaction is favored. That is, more B is produced.