Use Coupon: CART20 and get 20% off on all online Study Material

Total Price: R

There are no items in this cart.
Continue Shopping
Get instant 20% OFF on Online Material.
coupon code: MOB20 | View Course list

Get extra R 650 off


The rate costant K1 of a reaction is found to be double of that of rate constant K2 of another reaction .What is the relationship between corresponding activation energies of the to reactions .The Arrhenius constant is same for the reactions.

(A)E2 = E1 - ln 2 /RT

(B)E2=E1 ln 2/RT

(C)E2 + E1 = ln 2/RT

(D) E2 =E1 + RTln 2


Thanks in advance.

7 years ago


Answers : (1)


Given is that

k1  = 2*k2               .................(1)

Let A be the arrhenius constant for both the reactions . Then using arrhenius equation,       

k1=A*exp(-E1/RT)    ..............(2)

k2=A*exp( -E2/RT)  ...............(3)

[ where exp stands for 'e' raised to the power of ]

Divide (2) by (3)


OR exp(E2-E1)/RT= 2   [ from equation (1)  ]

Taking log both sides to the base e ,


(E2-E1)/RT = ln2

E2 = E1 + RTln2

Ans is (D ) & not (C)

If you watch all four options, equations given in (B) & (C) are dimensionally incorrect . So they should be ruled out at once.

Calculations show answer to be (D) as above.


7 years ago

Post Your Answer

Other Related Questions on Physical Chemistry

can you please explain me detail that Is milk of magnesia a suspension or it is a colloidal solution?
@ sai milk of magnesia is called as magnesio hydroxide , , and anything which contains suspended particles in it , we define that as suspension , " so, it is a suspension of mh (oh) 2 in...
Umakant biswal 29 days ago
Milk of magnesia is a suspension in water in a colloid there are small particles floating in the solution showing colloidal effect but in case of milk of magnesia or paint there is a...
Biswajit dash 29 days ago
What is a standard hydrogen electrode...............?
The standard hydrogen electrode consists of a platinum electrode coated with platinum black. The electrode is dipped in a solution of acid (usually 1M HCl) and pure H 2 gas is bubbled...
SAI SARDAR 3 months ago
@ ram A Standard Hydrogen Electrode (SHE) is an electrode that scientists use for reference on all half-cell potential reactions. The value of the standard electrode potential is zero,...
Umakant biswal 3 months ago
What do you mean by azeotroprs?please mention what are it`s types??
@ prasad azeotropes are besically those mixture which have the same composition in liquid and vapour state . 2- in will boil at a contaant temp . if the two above criterioa will be...
Umakant biswal 2 months ago
Hi ! prasad, Azeotropes is defined as the binary mixture containing same component in liquid and vapour phase and boil at constant temperature.It is not possible to separate the component of...
nath 2 months ago
The reagent most suitable for converting a primary alcohol into an aldehyde
@ anushri a reagent named as pyridium chl;orochromate (PCC ) will carry out this reaction and its the most suitable reagent which can convert primary alcohol into aldehyde . as u have not...
Umakant biswal 20 days ago
Any mild oxidizing agents like pyridinum dichromate or pyridinium chlorochromate can easily convert primary alcohols into aldehyde we use mild oxidizing agent .In case we use strong...
Amay chugh 20 days ago
How do we find the bond order in a compound.......?
1- Draw the Lewis structure. 2-count the total no of bond . 3-count the no of bond group between individual atom . 4-divide the no of bond between atoms by a total no of bond group in the...
Umakant biswal one month ago
you have already familiar with text books of intermediate. take reference from that text book .use this oppurtunity for only asking critical questions. It makes you perfect in writing JEE...
cris gayle one month ago
What is solubility product ?? On what factors it depends .
@ simran Solubility product ( Ksp ) is a equilibrium constant in a chemical reaction in which a ionic solid dissociates into yield its ion in the solution . general formula for the...
Umakant biswal 2 months ago
View all Questions »

  • Complete JEE Main/Advanced Course and Test Series
  • OFFERED PRICE: R 15,000
  • View Details
Get extra R 3,750 off

Get extra R 650 off

More Questions On Physical Chemistry

Ask Experts

Have any Question? Ask Experts

Post Question

Answer ‘n’ Earn
Attractive Gift
To Win!!!
Click Here for details