Question

1. Cite and discuss one example of temperature dependence of equilibrium constant in daily life.

2. Cite one example of Le Chatelier principle in daily life.

Answer 1

(A)Let us take the example of drying of clothes. The two processes involving in this are evaporation and condensation. By evaporation the water gets out of the clothes by gaining energy and go into vapour state. Let's call this as forward reaction and thas equilibrium constant K_{​​​​​​F} associated with it. Let the backward reaction be condensation I,e the conversion of vapours back to water on the clothes that are drying let the equilibrium constant associated with this be K_{​​​​​​b.} we know as we increase the temperature of the surrounding the clothes will dry more quickly as the water molecules will gain more energy and hence we can say the rate of forward reaction increases with increase in temperature. This increase in forward rate means that the equilibrium constant of forward reaction has increased. And for the backward reaction the equilibrium constant gets decreased. Hence we can see that the temperature effects the equilibrium constant of the reaction discussed above .

(B).

Let's take the above example as the le chatliers .

In the process above I,e evaporation we know that evaporation is associated with cooling . I,e the forward reaction is associated with decrease in temperature. Now if we increase the temperature the forward reaction should increase in accordance to the le chatliers principle.

As it is well known fact that clothes dry more rapildly at higher temperatures. Hence this example confirms the la chat liers principle.