Experiment | [NO] (M) |
[O2] (M) |
Initial Rate (M/s) |
|
1 | 0.0126 | 0.0125 | 1.41 x 10-2 |
|
2 | 0.0252 | 0.0125 | 5.64 x 10-2 |
|
3 |
0.0252 |
0.0250 |
1.13 x 10 -1 |
The rate of the reaction for a particular reaction explains how slowly or quickly a reaction takes place. The rate law can be used to find the rate of a reaction.
The order of a reaction is defined as an index to which a concentration term is raised in the rate law. The order of a reaction is found using experimental results. By substituting the experimental results for a reaction and the concentration of reactants the order of the reaction can be calculated.
For the reaction,
The rate of the reaction is written as follows:
Here, , are the molar concentration of reactants A and B respectively. And x and y are order of the reaction with respect to A and B.
(1)
The reaction is as follows:
The rate law is written as follows:
From experiment 1 and 2
…… (1)
And
…… (2)
Divide equation (2) by (1) as follows:
On solving,
From experiment 2 and 3
…… (2)
And
…… (3)
Divide equation (3) by (2) as follows:
On solving,
Thus, the rate law is written as follows:
(2)
The rate law of the reaction is as follows:
Substituting for the units of r and M for and .
(3)
The rate law of the given reaction is as follows:
……(4)
For experiment (1), the rate is written as follows:
For experiment 2, the rate law is as follows:
For experiment 3, the rate law is as follows
(3)
Take the average of all the rate constant as follows:
(4)
The rate law of the given reaction is:
Substitute for , for and for k.
(5)
The rate of disappearance of is:
Substitute for .
Ans: Part 1
The rate law of the reaction is as follows:
Part 2
The units of rate constant is .
Part 3The average value of rate constant is .
Part 4The rate of disappearance of NO is .
Part 5The rate of disappearance of is .
The following data were collected for the rate of disappearance ofNO in the reaction 2NO(g) +...
Using The Following Data, Determine the Rate Law For The Reaction. Part A. 2NO(g)+O(g) --> 2NO2(g) Experiment [NO] [O2] Initial Rate (M/s] 1 0.0126 0.0125 1.41x10^-2 2 0.0252 0.0250 1.13x10^-1 3 0.0252 0.0125 5.64x10^-2 Part B. S2O8charge2-(ag)+3 I charge 1-(aq) ----> 2SO4charge2-(aq)+I3charge1-(aq) Experiment [S2O8charge2-] [ I charge1-] Initial Rate (M/s) 1 0.023 0.048 6.8x10^-6 2 0.054 0.048 1.6x10^-5 3 0.054 0.019 6.3x10^-6
The reaction 2NO(g)+O2(g)→2NO2(g) is second order in NO and first order in O2. When [NO]= 4.5×10−2 M and [O2]= 3.7×10−2 M , the observed rate of disappearance of NO is 9.9×10−5 M/s . What is the rate of disappearance of O2 at this moment?
The reaction 2NO(g) + O2(g) + 2NO2(g) was studied, and the following data were obtained where A[02] Rate At [NO). [02] Initial Rate (molecules/cm) (molecules/cm) (molecules/cms) 1.00 x 1018 3.00 x 1018 2.50 x 1018 1.00 x 1018 1.00 x 1018 2.50 x 1018 2.00 x 1016 1.80 x 1017 3.13 x 1017 What would be the initial rate for an experiment where [NO], = 1.24 x 1018 molecules/cm and [02], = 7.50 x 1018 molecules/cm'? molecules/cm. Rate = -S
4. . The reaction 2NO(g) + O2(g) → 2NO2(g) has the following rate law: Rate = k[O2][NO]2 . If the concentration of NO is reduced by a factor of two, the rate will __________
Given the reaction and following data: 2NO + O2 → 2NO2 Calculate the rate law constant and write the rate law. Trial [NO] (mol/L) [O2] (mol/L) Rate (mol/L/hr) 1 0.125 0.125 2.57 x 10-2 2 0.250 0.125 5.20 x 10-2 3 0.250 0.250 4.16 x 10-1
Consider the following reaction: 2NO(g)+O2(g)⇌2NO2(g)2NO(g)+O2(g)⇌2NO2(g) The data in the table show the equilibrium constant for this reaction measured at several different temperatures. Temperature K 400 1.9x10^7 425 2.5x10^6 465 1.6x10^5 515 8.8x10^3 600 2.0x10^2 Use the data to find ΔrS∘ΔrS∘ for the reaction. (answer in J K-1 mol-1) The answer is NOT 158
11) Given the following data: N2 +20(g) + 2NOZ 2NO + O2(g) → 2NO2 AHxn= 66kJ AHrxn= -114k) What is the AH for the reaction: N2+ O2(g) → 2N0| 11) Given the following data: N2 +2O2(g) → 2NOZ 2NO + O2(g) → 2N02 AHıxn= 66kJ AHrxn= -114k] What is the AH for the reaction: N2+ O2(g) → 2NO 11) Given the following data: N2 +20_18) + 2NO2 2NO + O2(g) → 2NOZ AHxn= 66kJ AHx= -114k] What is the AH...
2. (10 pts) Consider the following second-order reaction: 2NO2(g) + 2NO(g)+O2(g) The rate constant is 0.54 M-15-1, at 300 °C. How long would it take for the concentration of NO2 to decrease from 0.62M to 0.28M?
The reaction 2NO(g)+0(9)2NO,(g) was studied, and the following data were obtained where Al02) Rate= At NO Initial Rate (molecules/em (molecules/em ) (molecules/ems) 1.00 x 1018 1.00 x 1018 2.00 x 101 3.00 x 108 1.00 x 108 1.80 x 107 2.50 x 10 2.50 x 10 3.13x 10 What would be the initial rate for an experiment where NO=9.50 x 10 molecules/cm and Ol=7.65 x 108 molecules/em Rane- molecules/em.
Consider the following reaction: 4NO(g) + O2(g) + 2N203(9) What is the rate of disappearance of O2 when the rate of disappearance of NO is 1.60 x 10-4 mol L 'sec 1 O 1.6 x 10-4 mol L sec1 O 6.4 x 10-4 mol L 'sec1 O 4.0 x 10-5 mol Lºsec1 O 3.2 x 10-4 mol L 'sec1 O 8.0 x 10-5 mol L''sec 1