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Quiz 6-solutions-4 - Version 306 Quiz 6 laude(51635 This...

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Version 306 – Quiz 6 – laude – (51635) 1 This print-out should have 8 questions. Multiple-choice questions may continue on the next column or page – find all choices before answering. 001 5.0points If a certain reaction has an activation en- ergy ( E a ) of 1 . 2 kJ · mol - 1 , and a rate con- stant ( k ) of 2 . 3 × 10 3 s - 1 at a room tempera- ture, which expression could be used to solve for its rate at 273 K ? Note: exp( x ) isanother wayofwriting e x 1. k 2 = 2 . 3 × 10 3 · exp parenleftbigg 1 . 2 8 . 314 parenleftbigg 1 298 - 1 273 parenrightbiggparenrightbigg 2. k 2 = 2 . 3 × 10 3 · exp parenleftbigg 1 . 2 8 . 314 parenleftbigg 1 273 - 1 298 parenrightbiggparenrightbigg 3. k 2 = 2 . 3 × 10 3 · exp parenleftbigg 1 , 200 8 . 314 parenleftbigg 1 298 - 1 273 parenrightbiggparenrightbigg correct 4. k 2 = 2 . 3 × 10 3 · exp parenleftbigg - 1 , 200 8 . 314 parenleftbigg 1 298 - 1 273 parenrightbiggparenrightbigg 5. k 2 = 2 . 3 × 10 3 · exp parenleftbigg 1 , 200 8 . 314 parenleftbigg 1 273 - 1 298 parenrightbiggparenrightbigg Explanation: ln parenleftbigg k 2 k 1 parenrightbigg = E a R parenleftbigg 1 T 1 - 1 T
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