Chemistry

Problem

For the equilibrium reaction

\mathrm{N_2O_4(g) \rightleftharpoons 2\,NO_2(g)}

at constant temperature, an additional amount of

\mathrm{NO_2}

is injected so that its concentration increases instantaneously while the concentration of

\mathrm{N_2O_4}

is unchanged. Which of the following best describes the immediate effect on the reaction quotient

Q_c

and the subsequent shift of the system? a)

Q_c>K_c

; the reaction will shift toward

\mathrm{NO_2}

Q_c=K_c

; the reaction will not shift c)

Q_c>K_c

; the reaction will shift toward

\mathrm{N_2O_4}

Q_c<K_c

; the reaction will shift toward

\mathrm{NO_2}