The rates of the forward and reverse reactions for a gaseous system at 350 K were measured at regular intervals.
Time (s): 0 20 40 60 80 100
Forward rate (mol·L⁻¹·s⁻¹): 0.80 0.54 0.37 0.25 0.18 0.18
Reverse rate (mol·L⁻¹·s⁻¹): 0.00 0.26 0.37 0.46 0.54 0.54
Determine, to the nearest 10 s, the time at which this system first reaches equilibrium.