Lon-Capa 8th (final) HW assignment due Wednesday, November 30 by 5 pm. Quiz #6 opens Friday (11/18) at 5 pm. Due Wednesday, November 30 by 10 pm.

Questions to Consider… What do we mean by rate? How can we measure rate? How do we determine the order of a reaction? How do we calculate the rate constant, k? How do we calculate the activation energy, Ea, of a reaction?

What Do we Mean By Rate?

To find rate laws… Concentration versus rate (initial) Concentration versus time

Rate Can Change with Time

aA + bB  cC Experiment [A] [B] init. rate 1 0.10 M 0.10 M x

Clicker Question Expt. [A] [B] init. rate 1 0.10 M 0.20 M 1.0 x 10-5 M/s 2 0.20 M 0.20 M 2.0 x 10-5 M/s 3 0.40 M 0.40 M 1.6 x 10-4 M/s The rate law for aA + bB  cC is: a) rate = k[A][B] d) rate = k[A]2[B]2 b) rate = k[A]2[B] e) I don’t know c) rate = k[A][B]2

Concentration vs. Time

A Second Order Reaction

Good to Know…

Half-Life