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11 Integrated Rate Laws

# 11 Integrated Rate Laws - Ozone reacts with ethylene to...

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1 1 Ozone reacts with ethylene to produce formaldehyde. 2 O 3 (g) + 2 C 2 H 4 (g) 4 CH 2 O(g) + O 2 (g) Use the initial reaction rate data to determine the order of the reaction with respect to ozone, x, and ethylene, y. Report the overall order, x + y. Rate = k [O 3 ] x [C 2 H 4 ] y A) 2 B) 3 C) 4 4.0 2.0 1.0 3.0 1.0 1.5 1.0 1.0 0.5 Initial Rate 10 -12 mol L -1 s -1 [C 2 H 4 ] 10 -8 mol L -1 [O 3 ] 10 -7 mol L -1 2 Today’s To do Determine the order of a reaction from an appropriate graph of concentration vs time. Determine the rate constant of a reaction from an appropriate graph of concentration vs time. Use integrated rate laws to determine the concentration of reactants or products at any time. Use integrated rate laws to determine rate constants from concentration data. Identify unimolecular and bimolecular elementary reactions. Write the rate laws for elementary reactions.

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2 3 Integrated Rate Laws The rate law gives the rate at which reactant and product concentrations are changing. The integrated rate law gives a reactant concentration as a function of time. Integrated laws are obtained from rate laws by integration, i.e. using Calculus! 4 Three Cases for a Single Reactant, A Zero order with respect to A First order with respect to A Second order with respect to A Also applies to a swamping experiment: A+ B with concentration of B very high so it doesn’t change significantly.
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11 Integrated Rate Laws - Ozone reacts with ethylene to...

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