Question Answers
Sahay Sir > Question Answers
A reaction takes place in various steps. The rate constant for first, second, third and fifth steps are k1,k2,k3 and k5 respectively The overall rate constant is given by k=k2/k3(k1/k5)1/2 If activation energy are 40, 60, 50, and 10 kJ/mol respectively, the overall energy of activation (kJ/mol) is :
03
Jun
A reaction takes place in various steps. The rate constant for first, second, third and fifth steps are k1,k2,k3 and k5 respectively The overall rate constant is given by k=k2/k3(k1/k5)1/2 If activation energy are 40, 60, 50, and 10 kJ/mol respectively, the overall energy of activation (kJ/mol) is : 50 60 A reaction takes place [...]
Posted in:
Chapter 7 - Chemical Kinetics and Nuclear Chemistry (Level 1 and Level 2)
,
N Awasthi Physical Chemistry
,
Tags:
50 ,
60 ,
A reaction takes place in various steps. The rate constant for first ,
and 10 kJ/mol respectively ,
k2 ,
k3 and k5 respectively The overall rate constant is given by k=k2/k3(k1/k5)1/2 If activation energy are 40 ,
second ,
the overall energy of activation (kJ/mol) is : ,
third and fifth steps are k1 ,
The rate constant for two parallel reactions were found to be 10^−2 dm^3 mol^−1s^−1 and 4×10^−2 dm^3 mol^−1s^−1. If the corresponding energies of activation of the parallel reaction are 100 and 120 kJ/mol respectively, what is the net energy of activation (Ea) of A?
03
Jun
The rate constant for two parallel reactions were found to be 10^−2 dm^3 mol^−1s^−1 and 4×10^−2 dm^3 mol^−1s^−1. If the corresponding energies of activation of the parallel reaction are 100 and 120 kJ/mol respectively, what is the net energy of activation (Ea) of A? The temperature coefficient of a reaction is : June 3, 2021 [...]
A hydrogenation reaction is carried out at 500 K. If the same reaction is carried out in the presence of a catalyst at the same rate with same frequency factor, the temperature required is 400K. What is the activation energy of the reaction if the catalyst lowers the activation energy barrier by 16 kJmol^−1.
03
Jun
A hydrogenation reaction is carried out at 500 K. If the same reaction is carried out in the presence of a catalyst at the same rate with same frequency factor, the temperature required is 400K. What is the activation energy of the reaction if the catalyst lowers the activation energy barrier by 16 kJmol^−1. A [...]
Posted in:
Chapter 7 - Chemical Kinetics and Nuclear Chemistry (Level 1 and Level 2)
,
N Awasthi Physical Chemistry
,
Tags:
A hydrogenation reaction is carried out at 500 K. If the same reaction is carried out in the presence of a catalyst at the same rate with same frequency factor ,
the temperature required is 400K. What is the activation energy of the reaction if the catalyst lowers the activation energy barrier by 16 kJmol^−1. ,
For given hypothetical elementary parallel reaction, Initially only 2 moles of A are present. The total no. of moles of A, B and C at the end of 75% reaction are:
03
Jun
For given hypothetical elementary parallel reaction, Initially only 2 moles of A are present. The total no. of moles of A, B and C at the end of 75% reaction are: B and C at the end of 75% reaction are: For given hypothetical elementary parallel reaction Initially only 2 moles of A are present. [...]
A gaseous compound A reacts by three independent first order process (as shown in figure) with rate constant 2×10^−3,3×10^−3 and 1.93×10^−3sec^−1 for products B, C and D respectively, If initially pure A was taken in a closed container with p=8 atm then the partial pressure of B (in atm) after 100 sec from starting the experiment.
03
Jun
A gaseous compound A reacts by three independent first order process (as shown in figure) with rate constant 2×10^−3,3×10^−3 and 1.93×10^−3sec^−1 for products B, C and D respectively, If initially pure A was taken in a closed container with p=8 atm then the partial pressure of B (in atm) after 100 sec from starting the [...]
Posted in:
Chapter 7 - Chemical Kinetics and Nuclear Chemistry (Level 1 and Level 2)
,
N Awasthi Physical Chemistry
,
Tags:
3×10^−3 and 1.93×10^−3sec^−1 for products B ,
A gaseous compound A reacts by three independent first order process (as shown in figure) with rate constant 2×10^−3 ,
C and D respectively ,
If initially pure A was taken in a closed container with p=8 atm then the partial pressure of B (in atm) after 100 sec from starting the experiment. ,
For the first order homogeneous gaseous reaction A→2B+C, if the total pressure after time ‘t’ was Pt and after long time (t gives infinite) was P infinite then k in terms of Pi, Pt & t is
03
Jun
For the first order homogeneous gaseous reaction A→2B+C, if the total pressure after time ‘t’ was Pt and after long time (t gives infinite) was P infinite then k in terms of Pi, Pt & t is For the first order homogeneous gaseous reaction A→2B+C if the total pressure after time 't' was Pt and [...]
The reaction A(g)→B(g)+2C(g) is a first order reaction with rate constant 2.772×10^−3 sec^−1. Starting with 0.1 mol of A in 2 litre vessel, find the concentration of A after 250 sec when the reaction is allowed to take place at constant pressure and at 300 K ?
03
Jun
The reaction A(g)→B(g)+2C(g) is a first order reaction with rate constant 2.772×10^−3 sec^−1. Starting with 0.1 mol of A in 2 litre vessel, find the concentration of A after 250 sec when the reaction is allowed to take place at constant pressure and at 300 K ? find the concentration of A after 250 sec [...]
Reaction A+B→C+D follows following rate law: r = k[A]+2/1 [B]2/1. Starting with 1 M of A and B each, what is the time taken for concentration of A become 0.1 M ?
03
Jun
Reaction A+B→C+D follows following rate law: r = k[A]+2/1 [B]2/1. Starting with 1 M of A and B each, what is the time taken for concentration of A become 0.1 M ? Reaction A+B→C+D follows following rate law: r = k[A]+2/1 [B]2/1. Starting with 1 M of A and B each what is the time [...]
Two first order reactions have half-lives in the ratio 8:1, calculate the ratio of time intervals t1:t2. The time t1 and t2 are the time period foe (1/4)th and (3/4)th completion respectively:
03
Jun
Two first order reactions have half-lives in the ratio 8:1, calculate the ratio of time intervals t1:t2. The time t1 and t2 are the time period foe (1/4)th and (3/4)th completion respectively: calculate the ratio of time intervals t1:t2. The time t1 and t2 are the time period foe (1/4)th and (3/4)th completion respectively: Two [...]
Which of the following is incorrect statement ? (a) Stoichiometry of a reaction tells about the order of the elementary reaction
03
Jun
Which of the following is incorrect statement ? (a) Stoichiometry of a reaction tells about the order of the elementary reaction Which of the following is incorrect statement ? (a) Stoichiometry of a reaction tells about the order of the elementary reaction June 3, 2021 Category: Chapter 7 - Chemical Kinetics and Nuclear Chemistry (Level [...]