For a reaction , `Br_(2) hArr 2 Br,` the equilibrium constant at 600K and 800 K are respectively `6.1 xx 10^(-12)` and `1.0 xx 10^(-7)`. What is the nature of the reaction?

Explanation

From the data listed above, the value of the equilibrium constant increases with rise in temperature . This means that with rise in temperature , equilibrium is shifted in the forward reaction. This is possible only in case the forward reaction is endothermic so that according to Le Chatelier's principle the effect of increase in temperature may be neutralised.