Question

For this equilibrium reaction, which of the following describes how the given stress affects the equilibrium point?
N2 (g)+ O2 (g) --> 2NO (g)



Increase in pressure results in shifting of equilibrium to the right

Removal of NO results in shifting of equilibrium to the left

Increase in pressure results in shifting of equilibrium to the left

Removal of N2 results in shifting of equilibrium to the left

Answer 1

This is a problem that deals with LeChatlier's principle.

The first choice would have no effect on the equilibrium (sum of coefficients of reactants vs. products are equal).
The second choice shifts the equilibrium to the right.
The third choice would have no effect on the equilibrium (again, sum of coefficients of reactants vs. products are equal).
The fourth choice would indeed shift the equilibrium to the left -- the loss of N2 would result in the reaction wanting to produce more of it.

The last choice is the correct one.

Answer 2

Thank you.