CHEMISTRY · Single correct · A Level · Chemistry · Chemical equilibria (Le Chatelier’s principle and Kc) · Chemical equilibria (Le Chatelier’s principle and Kc)
Problem
A reversible reaction is monitored, and the instantaneous rates shown below are obtained.
Time (s) | Rate_forward (mol·L⁻¹·s⁻¹) | Rate_reverse (mol·L⁻¹·s⁻¹)
0 | 0.80 | 0.00
20 | 0.60 | 0.10
40 | 0.45 | 0.25
60 | 0.35 | 0.35
At 40 s, which statement best describes the net progress of the reaction?
(a) No net conversion is occurring because the forward and reverse rates are becoming constant.
(b) Products are being converted to reactants because the reverse rate is increasing toward the forward rate.
(c) Reactants are being converted to products because the forward rate exceeds the reverse rate.
(d) No net conversion is occurring because both the forward and reverse rates are decreasing.