1.

For the reaction, N_(2)O_(4(g))iff2NO_(2(g)), the value of K is 50 at 400 K and 1700 at 500 K. Which of the following options is/are correct?

Answer»

The reaction is endothermic
The reaction is exothermic
If `NO_(2(g))andN_(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
The entropy of the SYSTEM remains constant

Solution :For an endothermic reaction, K increases with increase in temperature.
At 400 K, `Q=((p_(NO_(2)))^(2))/((p_(N_(2)O_(4))))=((20)^(2))/(2)=200`
As `QgtK`, hence, reaction proceeds in backward DIRECTION.


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