A ALEKS Corinne wener x \\ cnegg Study Guided 5. x \\ Chegg Study l Guided S/X C

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A ALEKS Corinne wener x cnegg Study Guided 5. x Chegg Study l Guided S/X CA ALEKS Corinne wene GAALEKS Connne were × x Corinne Deducing a rate law from initial reaction rate data Some measurements of the initial rate of a certain reaction are given in the table below. [N][Hinitial rate of reaction 0.458M 0.526M 0.0502 M0.526M 0.458 M0.0613M 56.0 Ms 0.673 Ms 6.53 MIs dlo Use this information to write a rate law or thisr, and calculate the value of the rate stant Round your value for the rate constant to 2 significant digits. Also be sure your answer has the correct unit symbol. rate = k Check 1:49 PM E 221/2018 5 LEKS-Cerinne Ve..

Explanation / Answer

Let the rate expression be  

rate = k [N2]a[H2]b

comparing experiment no.1 and no.2

we have [0.458/0.0502]a = 56/0.673

[9.12]a = 83.209

Thus a = 2

similarly comparing experiment 1 and 3 we have

[0.526/0.0613]b = 56/6.53

or 8.58b = 8.575

Thus b = 1

Hence

1) the rate law is

Rate = k [N2]2[H2]

2) substituting any experimental values in rate expression

56 = k [0.458]2[0.526]

thus k = 507.54/sM2

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