InterviewSolution
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InterviewSolution
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For the reaction `N_(2)O_(4)(g) hArr 2 NO_(2) (g)`, the value of K is 50 at 400 K and 1700 at 500 K. Which of the following options is correct ?A. The reaction is endothermicB. The reaction is exothermicC. 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,D. The entropy of the system increases. |
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Answer» Correct Answer - A::C::D (a) As the value of K increases with increase of temperature and `K=(k_(f))/(k_(b))`, this means that `k_(f)` increases, i.e., formard reaction is favoured. Hence, reaction is endothermic. (c) At 400 K, `Q=(p_(NO_(2))^(2))/(p_(N_(2)O_(4)))=((20)^(2))/(2) = 200 `. Thus `Q gt K`. Equilibrium will shift backward to form more `N_(2)O_(4)`. (d) As reaction is accompanied by increase in the number of moles , entropy increases. |
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