Kinetics

Chemical Kinetics – Initial Rates Method

 

Initial Rates Method 
O.ü_oH 
2- 
O. min 
3

 

 

2. Dinitrogen Pentoxide decomposes into Nitrogen Dioxide and Oxygen as Shown in the equation below. If the average 
rate of appearance of N02 is 4.6 x IOA-3 mol / L*s. what is the average rate of disappearance of N205? 
N D 2 + 02

 

4. The table below shows the concentration of reactants A and B in units of M and the initial rate of reaction in units of 
M * minâ-l. (a) Determine the rate law. (b) Calculate the value of the rate constant. (c) What will be the initial rate if 
[A) : 0.5M and [B) : 0.8M ? 
Trial 
2 
3 
0.20M 
0.20M 
0.40M 
0.20M 
0.40M 
0.20M 
Initial Rate 
0.4 Wmin 
1.6 Wmin 
0.8 M/min

 

 

-usually, you need experimental data to determine the exponential coefficients in the rate law equation, because you don’t know how many subreactions are involved. However, if the reaction is elementary (occurs in a single step), then you can raise it to the coefficient in the chemical equation.

 

An elementary reaction is a reaction that occurs in a single 
step. The rate law for an elementary reaction can be 
derived from the coefficients of the reactants in the 
balanced equation. For example, the rate law for the 
elementary reaction 2A + B —Y products is rate = 
https://www.khanacademy.org Reaction mechanisms 
Elementary reactions (video) I Kinetics - Khan Academy 
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https://www.khanacademy.org/science/ap-chemistry-beta/x2eef969c74e0d802:kinetics/x2eef969c74e0d802:reaction-mechanisms/v/elementary-rate-laws#:~:text=An%20elementary%20reaction%20is%20a,A%5D%C2%B2%5BB%5D.

 

 

Integrated Rate Laws – Zero, First, & Second Order Reactions – Chemical Kinetics

 

Integrated Rate Law 
Zero Order First Order 
Rate k 
Rate : k[A] 
[Alo 
2k 
Second Order 
Rate =

 

Law 
¯ dt 
d[.Al 
d[Al ¯ 2161 
k[Aln 
- k[Al 
+ [A]n-l = 
Int Rate Law [Al = 
units 01 Rate (k) 
U rear to determine k VS. t 
'Of-life 
— kt Al [Aloe-H 
vs. t 
In(2) 
t1/2 = 
2k 
M 
•s 
Mn-l .S

 

Chapter 13.4: Using Graphs to Determine Rate Laws, Rate Constants and  Reaction Orders - Chemistry LibreTexts

 

 

Arrhenius' Equation | SpringerLink

 

Collision Theory – Arrhenius Equation & Activation Energy – Chemical Kinetics

 

Activation Energy 
lnA

 

—EA 丁 
K ple 
0 (