BIOM 121 1nd Edition Lecture 10 Outline of Last Lecture I In Class Questions Outline of Current Lecture I In class Questions II Integrated Rate Equations Current Lecture Integrated Rate Equation o aA products o Rate 1 A a t o Ant that for a first order reaction Rate k A 1 A k A a t ln A t ln A 0 ak t 0 Simplified ln A 0 ln A t akt Ln A 0 akt A 2 Zeroeth order A 0 A t akt Second order 1 1 akt A t A 0 1 In the past cyclopropane C3H6 was used in a mixture with oxygen as an anesthetic When heated cyclopropane rearranges to propene in a first order process The rate constant for this reaction is 2 42 hr at 500 C If the initial concentration of cyclopropane is 0 050 mol L how much time in hours must elapse for its concentration to drop to 0 010 mol L These notes represent a detailed interpretation of the professor s lecture GradeBuddy is best used as a supplement to your own notes not as a substitute Answer 0 67 hours 2 The decomposition of ammonia on a metal surface to form nitrogen gas and hydrogen gas is a zero order reaction At 873 C the value of the rate constant is 1 5x10 3 mol Lsec How long will it take to completely decompose 1 00 grams of ammonia in a 1 00 L flask Answer 2 0x101 seconds 3 The rate constant for the decomposition of nitrogen dioxide at a high temperature is 3 40 L molmin Determine the time needed for the concentration of NO 2 to decrease from 2 00 mol L to 1 50 mol L NO2 g NO g O2 g Answer To be answered next lecture
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