Chemical Engineering - Chemical Reaction Engineering - Discussion
Discussion Forum : Chemical Reaction Engineering - Section 1 (Q.No. 28)
28.
The rate constant of a chemical reaction increases by 100 times when the temperature is increased from 400 °K to 500 °K. Assuming transition state theory is valid, the value of E/R is
Discussion:
15 comments Page 1 of 2.
Ramsajan said:
2 years ago
According to transition theory answer - 8764k.
And according to Arrhenius theory, it's 9210k.
And according to Arrhenius theory, it's 9210k.
Athraa said:
3 years ago
Lnk2/lnk1 = E/R(1/T1 - 1/T2).
*k2 = 100k1.
So:
Ln100 = E/R(1÷400-1÷500).
E/R= 9210.
*k2 = 100k1.
So:
Ln100 = E/R(1÷400-1÷500).
E/R= 9210.
Rafi said:
5 years ago
According to transition theory;
K = ko.T.e^-E/RT
And from this we get;
Ln(k2/k1) = ln(T2/T1) + E/R {1/T1 -1/T2};
As K2 = 100K1 T1=400k T2=500k;
Ln(100k1/k1) = ln(500/400) + E/R {1/400 - 1/500};
Solving this we get E/R= 8764K.
K = ko.T.e^-E/RT
And from this we get;
Ln(k2/k1) = ln(T2/T1) + E/R {1/T1 -1/T2};
As K2 = 100K1 T1=400k T2=500k;
Ln(100k1/k1) = ln(500/400) + E/R {1/400 - 1/500};
Solving this we get E/R= 8764K.
(3)
Kuldeep verma said:
6 years ago
B is the Wrong answer
Right answer is (C) 8764°K
According to transition theory.
Right answer is (C) 8764°K
According to transition theory.
Mnnit said:
6 years ago
The Correct answer is C.
Vishal Verma said:
7 years ago
Option (C) is correct when it is given to transition state theory.
Option (B) is correct if we have given to assume Arrhenius theory.
Option (B) is correct if we have given to assume Arrhenius theory.
(1)
MUHAMMAD SALEH said:
7 years ago
Here we can use ln k2/k1 = E/R (1/T1-1/T2).
Srinath said:
8 years ago
C is the correct option. I also agree.
Parth said:
8 years ago
Correct Answer is 8764 k. Here we are calculating according to transition state theory, So formula is k = k0e-(E/RT)*T.
Ranjan Yadav said:
9 years ago
Ln((100k1/k1)) = E/R[(500 - 400)/(500 * 400)].
E/R = 9210 KELVIN.
E/R = 9210 KELVIN.
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