CHEMISTRY · Single correct · AP · Chemistry · Kinetics · Kinetics
Problem
For the reaction B → products, the following concentration data were obtained at 25 °C.
Time (min) 0 10 20 30 40
[B] (M) 0.120 0.086 0.062 0.045 0.033
Linear regressions gave the following results:
• [B] vs time: slope = −0.0022 M min^{−1}, r = −0.976
• ln[B] vs time: slope = −0.028 min^{−1}, r = −0.998
• 1∕[B] vs time: slope = 0.62 M^{−1} min^{−1}, r = 0.952
Which conclusion is most strongly supported by these data?
(a) The reaction is second order with k=6.2×10−1M−1min−1.
(b) The reaction is first order with k=2.8×10−2min−1.
(c) The reaction is zero order with k=2.2×10−3Mmin−1.
(d) The reaction is first order with k=3.6×10−2min−1.