Chemical equiluibrium fir the reaction
`N_(2)O_(4)(g)hArr2NO_(2)(g)`
can be achived in _________ different ways.

Options

A. two
B. three
C. four
D. just one

Answer

B

Explanation

We can reach the equilibrium state by sarting with pure `N_(2)O_(4)` or with pure `NO_(2)` or with a mixture of `NO_(2)` and `N_(2)O_(4)`. In each case. We observe an initial change in color, either due to the formation of dark dark brown `NO_(2)` (if the color intensifies) or due to the depletion of `NO_(2)` (if the color fades), and then the final equilibrium state in which the color of `NO_(2)` no longer changes. Depending upon the temperature of the reacting system and on the initial amount of `NO_(2)` and `N_(2)O_(4)` the concentrations of `NO_(2)` and `N_(2)O_(4)` at equilibrium differ from system to system.