CHEM 1120 test 3 - Spring 2006 Page 1Circle the correct answer on the answer sheet.R = 8.314 J mol-1 K-1ln(2) = 0.693†HeRTkAΔ−=1. The rate constant for a reaction is 1.2 × 10-2 s-1 at room temperature (25EC). The activationenergy is 35.0 kJ mol-1. What is the reaction rate constant at 100EC?a. 7.0 × 1054b. 2.1 × 10-1 s-1c. 7.0 × 10-4d. 0.998 e. 1.0022. The following data was determined in a kinetics experiment.time /min pressure /atm time /min pressure /atm0.00 2.500 4.00 0.3382.00 0.920 6.00 0.125What is the order of this reaction?a. 0thb. ½ order c. 1st d. 2nd e. 3rd 3. The following initial rates were determined for one of the reactants in a reaction.CM /M rate /M s-1CM /M rate /M s-110 1.50 20 6.0015 3.78 25 9.38What is the order of the reaction in this reactant?a. -1st b. 0th c. 1st d. 2nd e. 3rd 4. The half life of a nuclear decay is 15.5 yr. After how many years will there be just 15 % left?a. 42.4 yr b. 13.0 yr c. 31.0 yr d. 95.0 yr e. 67.0 yrCHEM 1120 test 3 - Spring 2006 Page 25. The following is the reaction mechanism for the reaction H2 + I2 ! 2HI.I2 º 2I. fastH2 + I. ! H2I. slowH2I. + I2 ! 2HI fastThe observed kinetics is given as:a.22'HIrate k P P=b.22221' (i.e. k' )HHIIPrate k P PP−=c.3222'HIrate k P P=d.222'HIrate k P P=e.1222'HIrate k P P=6. The slope of the plot of ln(k) versus 1/T (an Arrhenius plot) is –2.55 × 103 K. What is thevalue for the activation energy?a. 10 kJ mol-1b. 21.2 kJ mol-c. 25 kJ mol-11d. 46 kJ mol-1e. 50 kJ mol-17. The following data are the amounts of reactants with respect to time for a first order reaction. What is the rate constant?time /min reactant /g time /min reactant /g0 16.520 30.0 0.95610.0 6.389 40.0 0.37020.0 2.471 50.0 0.143a. 0.095 s-1b. 0.22 s-1c. 20.0 s-1d. 2.0 × 10-2 s-1e. 1.0 × 10-3 s-18. The organic chemist rule of thumb depends upon most organic reaction having an activationenergy of about 50 kJ mol-1. If this worked, about how much faster would a reaction go ifone were to increase the temperature by 10EC starting at room temperature (25EC)?a. half as fastb. 50 % faster (1.5 times faster)c. 2 times fasterd. 3 times fastere. 4 times fasterCHEM 1120 test 3 - Spring 2006 Page 39. In the reaction: 2NO2 !N2O4 the mechanism is postulated to be:NO2 ! NO + O slowNO + NO2 ! N2O3 fastN2O3 + NO2 ! N2O4 + NO fastN2O3 + O ! N2O4 fastThe observed rate for this mechanism should be:a.23NOrate kP=b.2NOrate kP=c.23 21N O NO NOrate kP P P−=d.22NOrate kP=e.2dNO NOrate kP P=10. What is the product for the following reaction?CH3CH2=CH2 + KMnO4 ! ?a. b. c. d. e.11. Which of the following molecules has stereo (optical) isomers?a. b.c. d. e. 12. Which of the diagrams above (question 11) has a cis-trans isomer? (a.,b.,c.,d. or e.?)CHEM 1120 test 3 - Spring 2006 Page 413. What is the product for the following reaction?CH3CH2OH + C6H5COOH presence of sulfuric acid > ?a. an ether b. an amide c. an ester d. a Nylon® e. a Teflon® 14. What is the product for the following reaction?CH2=CH2 + Br2 ! ?a. b. c. d. e.15. Which of the following structures is not a correct organic structure?a. b.c. d. e.16. What is the product in the following reaction?H2C=CH2 UV light or catalysts > ? a. b.c. Teflon ® d. e. Nylon ®CHEM 1120 test 3 - Spring 2006 Page 517. What is the monomer for latex (and rubber)a. b. c. d. e. 18. What is the name of the following compound? a. 2,2,4-trimethylpentaneb. 2,2,4-trimethyloctanec. cyclopentaned. isononanee. n-octane19. What functional group(s) does the compound have?a. an amino, an alcohol group and a carboxylic acid groupb. a carboxylic acid groupc. an amide group and an alcohol groupd. a secondary amino group and an aldehyde groupe. an amino and a carboxylic acid group20. What is the result of the reaction:CH3CH2OH presence of sulfuric acid > ?a. an inorganic esterb. a cyclic hydrocarbonc. an etherd. an organic estere. TNTCHEM 1120 test 3 - Spring 2006 Page 6ANSWER SHEETNAME__________________________________________________________________1. a. b. c. d. e.2. a. b. c. d. e.3. a. b. c. d. e.4. a. b. c. d. e.5. a. b. c. d. e.6. a. b. c. d. e.7. a. b. c. d. e.8. a. b. c. d. e.9. a. b. c. d. e.10. a. b. c. d. e.11. a. b. c. d. e.12. a. b. c. d. e.13. a. b. c. d. e.14. a. b. c. d. e.15. a. b. c. d. e.16. a. b. c. d. e.17. a. b. c. d. e.18. a. b. c. d. e.19. a. b. c. d. e.20. a. b. c. d. e.CHEM 1120 test 3 - Spring 2006 Page