1. Tardigrade
  2. Question
  3. Chemistry
  4. The equilibrium constant of the following isomerisation reaction at 400 K and 298 K are 2.07 and 3.42 respectively. <img class=img-fluid question-image alt=Question src=https://cdn.tardigrade.in/q/nta/c-fncfsehydnchqncm.jpg /> Which of the following is/are correct? I. The reaction is exothermic II. The reaction is endothermic III. At 400 K , 50 % of cis-butene and 50 % of trans-butene are present at equilibrium IV. Both at 298K and 400K , k1 =k- 1

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Q. The equilibrium constant of the following isomerisation reaction at $400\, K$ and $298\,K$ are $2.07$ and $3.42$ respectively.
Question
Which of the following is/are correct?
I. The reaction is exothermic
II. The reaction is endothermic
III. At $400\,K$ , $50\%$ of cis-butene and $50\%$ of trans-butene are present at equilibrium
IV. Both at $298K$ and $400K$ , $k_{1} \, =k_{- 1}$

NTA AbhyasNTA Abhyas 2022

Solution:

As on increasing temperature $K_{e q}$ is increasing so reaction is exothermic.