Answer
The reaction is not at equilibrium, and it will proceed in the products direction (to the right).
Work Step by Step
1. The exponent of each pressure is equal to its balance coefficient.
$$Q_P = \frac{P_{Products}}{P_{Reactants}} = \frac{P_{ NO } ^{ 2 }P_{ Br_2 }}{P_{ NOBr } ^{ 2 }}$$
2. Substitute the values and calculate the quotient value:
$$Q_P = \frac{( 0.10 )^{ 2 }( 0.10 )}{( 0.10 )^{ 2 }} = 0.10$$
3. Since $Q_p \lt K_p$, the reaction is not at equilibrium, and it will proceed in the products direction (to the right).
