Chem Equ i l l

BITSAT 2015 Online › Physical Chemistry questions › Chem Equ i l l

The diagram shows the rcn. profile of a typical rcn

Rctnts.>< prods

Which of the following changes would cause both of the rate consts k₁ & k_-1 to be increased

a) Introducing a catalyst
b)heating the equill mix.
c)Cooling the mix.
d)Increasing the conc. of the reactions

More than one option is correct!!!!!

#Chemistry #Physical Chemistry

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6 Answers

24

eureka123 ·2009-10-26 05:53:59

What is k_-1?

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4

UTTARA ·2009-10-26 08:45:54

k value for forward rcn is k & value for backward rcn is k_-1

These 2 had to be placed abv & below the arrow marks connecting rctnts & prods respectively

But i din't know how to :(

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1

Rocky Crazy ·2009-10-26 21:15:33

B and C will b the correct answers..

I think..

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106

Asish Mahapatra ·2009-10-26 21:36:37

the answer is (a) i think

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4

UTTARA ·2009-10-27 02:22:02

Answer is A & B

But i want the explanation plz!!!!

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1357

Manish Shankar ·2009-10-27 02:44:02

equilibrium constant, K=k₁/k_-1

adding a catalyst increases the rate of both the forward and backward reaction
i.e. k₁ and k_-1 increases but K remains constant

rate constant from arrhenius equation
r=ke^-Ea/RT

So heating means increasing the temperature

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