Test-exam 2

As ph increases logr1 oxidation of ethanol by

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Unformatted text preview: as b. based on the balancing coefficients of the chemical reaction. c. by educated guesses. d. by performing the experiment. * e. by studying the reaction under several different temperature conditions. n m 13. For the reaction C2 H 6 ( g ) 2CH 3 ( g ) , the rate law is Rate hour? 5.50 x 10-4 Ms-1 2.76 x 10-3 Ms-1 1.10 x 10-5 Ms-1 1.52 x 10-6 Ms-1* 3.2 x 10-10 Ms-1 k[C2 H 6 ( g )] . If k 5.50 104 s 1 and [C2 H 6 ( g )]o 0.0200 M , what is the rate of the reaction after one a. b. c. d. e. 9 Ans. Since the reaction is first order, therefore [C H ] ln 2 6 kt [C2 H 6 ]o Rearranging this equation, [C2 H 6 ] exp ln[C2 H 6 ]o kt Substituting [C2 H 6 ( g )]o , k, and t (=3600 s) in the equation, one gets the [C2 H 6 ( g )] . [C2 H 6 ( g )] in k[C2 H 6 ( g )] , one gets the rate after one hour. Substituting 14. Consider the reaction, 2 H 2 O2 2 H 2O , what is the ratio of the initial rate of appearance of H 2O to the initial rate of disappearance of O2 ? a. 1 : 1 (i.e., the initial rate of the appearance of H 2O is the same as the...
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This note was uploaded on 03/03/2011 for the course CHEM 100A taught by Professor Dai during the Spring '06 term at UCSD.

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