Chapter 12: Chemical Kinetics. Spontaneity – inherent tendency for a reaction to occur; does not mean speed Reactions have different rates: 2 H 2 + O 2 2 H 2 O SLOW Explosions FAST To be useful, reactions must occur at a reasonable rate. Chemical Kinetics.

ByRate Laws. Chapter 14 part II. Rate Laws. Chemical reactions are reversible. So far we have only considered the forward reaction in our rates. Eventually the rate is the difference between the forward & reverse rates. 2NO 2 (g) -> 2NO(g) + O 2 (g). 2NO(g) + O 2 (g) -> 2NO 2 (g).

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Integrated Rate Law. 2 types of rate laws. The differential rate law (what we have already done, often called simply the rate law ) shows how the rate of reaction depends on concentration. The integrated rate law shows how the concentrations of species in the reaction depend on time.

Integrated Rate Law. Rate laws can be converted into equations that tell us what the concentration of the reactants or products are at any time Calculus required to derive the equations but not to use them. First Order Reactions. Rate = k[A]

Integrated Rate Law. Rate laws can be converted into equations that tell us what the concentration of the reactants or products are at any time Calculus required to derive the equations but not to use them. Zero Order. Rate = k

Integrated Rate Law. Expresses the reactant concentrations as a function of time . aA → products Kinetics are first order in [A], and the rate law is Rate = k [A] Integrated first-order rate law is ln [A] = - kt + ln [A] 0

Integrated Rate Law. Expresses the reactant concentrations as a function of time . aA → products Kinetics are first order in [A], and the rate law is Rate = k [A] Integrated first-order rate law is ln [A] = - kt + ln [A] 0

Integrated Rate Law – First Order (25.5). Differential form of rate equation can be combined with rate law to give a relation between concentration and time First-order reactions (elementary) only involve a single reactant to first-order

Rate Law. Learning Goals: I will be able to write a rate law equation using a table of data and calculate rate constants .I will become familiar with reaction mechanisms and how they relate to the rate law . Rate Law Equation.

Rate Law. Example 1: N 2 O 5 2NO + ½ O 2. CH 3 CHO CH 4 + CO. (CH 3 ) 3 CBr + OH - (CH 3 ) 3 COH + Br -.

Rate Law. Mathematical expression that allows calculation of reaction rate as a function of reactant concentration. All Chemical Reactions Show:. Reaction rate depends on (is a function of) reactant concentration

Non-Linear Form of the Integrated Rate Law. Edward A. Mottel Integrated, First-Year Curriculum in Science, Engineering and Mathematics. Please Sit with Someone so that there is one computer for two people. Please be sure you or your partner has a copy of the Integrated Rate Law handout.