Final-2005(2) - Please print your name CHM3125 FINAL EXAM...

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Please print your name CHM3125 Family name: FINAL EXAM (50%) First name: 19-April-2005 Student #: Time allowed: 180 minutes NO BOOKS OR NOTES ALLOWED NO MOLECULAR MODELS ALLOWED CALCULATORS ALLOWED Question 1 2 3 4 5 6 7 8 Total Value 30 15 15 10 10 10 10 10 100 Mark Notes IMPORTANT : You must answer questions # 1, 2 and 3 You must answer 4 questions onl y from questions 4 to 8. Please indicate below which question you do NOT want marked. If you make no selection, question 8 will not be marked. Please do NOT mark question:
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CHM3125 Final Exam April 2005 page 2 of 13 1. (30 MARKS – stars show marks ) Short Answer: no part marks. a) *The rate constant for a diffusion-controlled reaction will (circle one) INCREASE DECREASE STAY CONSTANT with decreasing solvent viscosity. b) *According to the Arrhenius expression, if the activation energy for a reaction is zero (E a =0) then the value of the rate constant for the reaction is equal to the parameter known as _________________________________________________________. c) *The chain length of a chain reaction is directly proportional to ( circle one ): initiation termination termination propogation propogation initiation d) ***Given the following figure: 0 40 80 120 ! G(kJ/g-atom of C) 160 200 400 600 800 1000 1200 Temp. °C Ethane Ethylene Acetylene Benzene Cyclohexane 1400 Figure 3
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CHM3125 Final Exam April 2005 page 3 of 13 To transform cyclohexane into benzene, a temperature ABOVE or BELOW ( circle one ) _____________________________°C is required. This process would also require a(an) ____________________________ catalyst and the hydrogen pressure should be ( circle one ) LOW HIGH IRRELEVANT e) **A candle in microgravity gives a hemispherical flame. In contrast, the common flame on earth has the shape in the figure. Explain (briefly!) why it acquires this characteristic shape. f) *In the Monsanto process, methanol is converted into __________________________. g) *Label the oxidation state of the metal centre in the complex below. Re
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Final-2005(2) - Please print your name CHM3125 FINAL EXAM...

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