# Discussion2_ch13_070810_Answer - Rate Law(3 In an...

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Rate Law (3) In an experiment, A Products, the following graph was obtained. What is the reaction order? Write the rate law. The concentration decreases in a linear fashion (without any dependence on the initial concentration at each time interval). This is a characteristic of zero order behavior. The rate law is Rate = k·[A] 0 = Rate = k. Since k is a constant, the rate is also constant (remember rate is the slope of the line; the slope of a straight line is always constant). (4) In an experiment, A Products, the following graphs were obtained. What is the reaction order? Write the rate law. The concentration decreases in a non-linear fashion so this cannot be zero order. Both first and second order show this sort of curve in concentration versus time graphs and without any more information it is difficult to distinguish the two. However, the inclusion of the second graph or rate versus time allows us to decide. The rate decreases linearly with time – the rate is high at the beginning and low at the end. This is a characteristic of

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## This note was uploaded on 09/25/2010 for the course CHEM 123 taught by Professor Piao during the Spring '10 term at Aarhus Universitet.

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Discussion2_ch13_070810_Answer - Rate Law(3 In an...

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