Determine the average rate of change of B from t = 0 s to t = 212 s.

Question

Determine the average rate of change of B from t = 0 s to t = 212 s.

A ---> 2 B

Time - Concentration of A (M)

0 - 0.690

106 - 0.395

212 - 0.100

rateB = ________ M/s

Answer 1

Average rate of change of A = -∆[A] / ∆t = -0.590 M / 212 s = -0.00278 M/s (3 sig. figs.) negative because is disappearing.

Average rate of change of B = +2x rate of change of A = 0.00556 M/s (positive because B is appearing).