Chemistry

Problem

Consider

\text{N}_2\text{O}_4(g)\rightleftharpoons2\,\text{NO}_2(g)

at 350 K, for which

K_c=4.5\times10^{-3}

and

K_p=0.17

. A 1.50 L container at 350 K holds

0.040\,\text{mol}

\text{N}_2\text{O}_4

and

0.060\,\text{mol}

\text{NO}_2

. Which statement correctly compares the reaction quotients with their respective equilibrium constants and predicts the direction of change? a)

Q_c>K_c

and

Q_p>K_p

; the system will shift toward products. b)

Q_c>K_c

and

Q_p>K_p

; the system will shift toward reactants. c)

Q_c=K_c

and

Q_p=K_p

; the system is already at equilibrium. d)

Q_c>K_c

but

Q_p<K_p

; the direction cannot be predicted without additional data.