The equilibrium constant of the following isomerisation reaction at 400 K and 298 K are 2.07 and 3.42 respectively. 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

Question

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 (A) I and IV (B) II and IV (C) I and III (D) I only

Tardigrade Admin · Accepted Answer

As on increasing temperature Ke q is increasing so reaction is exothermic.

I and IV

II and IV

I and III

I only

As on increasing temperature Keq​ is increasing so reaction is exothermic.

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