CHEM 433 – 12/1/10 IX. Chemical Kinetics (Ch. 22 & Handout)

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CHEM 433 – 12/1/10 IX. Chemical Kinetics (Ch. 22 & Handout) • Determining Rate Laws (22.1, 22.3) - Integrated Rate Laws - graphical methods • Elementary Reactions: - “order” vs. “molecularity” • Connection between EQ and kientics (pre-temp dependence version…) EXAM #5 is ….? HW #11 is out – review sheet/web update ASAP.

Consider the following reaction, and the table of (initial) rate data: H2O (g) + SO3 (g)  H2SO4 (g). a) Write rate law in the blank below. RATE = __________________________ b) Calculate the value of the rate constant, w/ the proper units. c) Does the reaction occur as written, in a single elementary step? Explain. [H2O] [SO3] Rate 0.01 M 1.0 x 104 M/sec 0.02 M 4.0 x 104 M/sec 2.0 x 104 M/sec

Show that for: RATE = k [A]2 A plot of 1/[A] vs. t will be linear, w/ a slope = k. Also show that the half-life is given by: t1/2 = 1 / k[A0]