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  • For the reaction N_{2}O_{4}(g)\leftrightharpoons 2NO_{2}(g),, the value of K is 50 at 400 K and 1700 at 500 K. Which of the following options is correct? (i) The reaction is endothermic. (ii) The reaction is exothermic.

For the reaction N_{2}O_{4}(g)\leftrightharpoons 2NO_{2}(g),, the value of K is 50 at 400 K and 1700 at 500 K. Which of the following options is correct?

(i) The reaction is endothermic.

(ii) The reaction is exothermic.

(iii) If NO_{2} (g) and N_{2}O_{4}(g) are mixed at 400 K at partial pressures, 20 bar and 2 bar respectively, more N_{2}O_{4}(g) will be formed.

(iv) The entropy of the system increases.

Answers (1)

The answer is the option (i), (iii) and (iv)

Explanation: K increases with the increase in temperature, and when  K increases,  the reaction must be endothermic. Thus, the number of molecules increases, and there is an increase in entropy.

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