CHEM 1250 Study Guide - Quiz Guide: Molecularity, Mecha, Reaction Step

• School: Ohio State University
• Department: Chemistry
• Course: CHEM 1250
• Professor: All

Document Summary

Want k given that [no2] decreases from 3. 00 m to 0. 0314 m in 0. 833 min (49. 98 sec). Use the integrated rate equation for a 2nd order reaction. Need to know the order of reaction; look at the rate law above - it is 2nd order in no2. 1/0. 0314 m = (k) (49. 98 s) + 1/3. 00m. For a 2nd order reaction: t1/2 = 1/(k [a]0) (dependent of the initial conc) t1/2 = 1/{(0. 63052 m-1s-1)(0. 0100 m)} = 158. 59 s = 2. 64 min (takes 2. 64 min for conc to dec. by ) Both 0 (zero) and 2nd order half-lives depend on the initial conc of reactant, while 1st order does not. 2. (3 pts) draw a reaction coordinate diagram (energy profile or potential energy diagram) for an exothermic reaction. Label the axes, activation energy, ea, and the transition state (activated complex) and )e on the diagram.