For the equilibrium N O (g) ⇌ 2 NO (g) at 350 K,

CHEMISTRY · Subjective · AP · Chemistry · Equilibrium · Equilibrium

Problem

For the equilibrium N

_2

_4

(g) ⇌ 2 NO

_2

(g) at 350 K,

K_c = 0.212

. Concentration data were collected at two times: •

t = 80\,

s [N

_2

_4

] = 0.080 M, [NO

_2

] = 0.190 M •

t = 120\,

s [N

_2

_4

] = 0.070 M, [NO

_2

] = 0.200 M Determine which of these two times is closer to equilibrium by calculating

Q_c

for each and comparing to

K_c

. State the time that is closer.