Partial pressures (in atm) for the reaction ( N_2O_4(g) ; ; 2 ,NO_2(g) ) were…

CHEMISTRY · Single correct · AP · Chemistry · Equilibrium · Equilibrium

Problem

Partial pressures (in atm) for the reaction N2O4(g)  ⇌  2 NO2(g)\mathrm{N_2O_4(g) \;\rightleftharpoons\; 2\,NO_2(g)} were recorded as follows: Time (s): 0 10 20 30 40 P ⁣N2O4P_{\!\mathrm{N_2O_4}}: 0.80 0.60 0.53 0.52 0.52 P ⁣NO2P_{\!\mathrm{NO_2}}: 0.00 0.30 0.54 0.55 0.55 At which recorded time has the system most likely reached equilibrium? (a) 20 \text{ s} (b) 30 \text{ s} (c) 10 \text{ s} (d) 40 \text{ s}

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