33. 2057 Q. No. 25 State Le-Chatlier's principle. How does the change in temperature and pressure affect the equilibrium of
the following reaction?
(1+2+2]
N2(g) + 3H2(g) + 2NH3(g) + 22.4 K Cal
al

Le'chetelliers principle states that when an external factor such as temperature and pressure is added to a system in equilibrium...the disequilibrium will shift so as to annul the effect

Explanation:

To know the cause of increase in pressure in the above equation ...

You should note 2 things

1. the number of moles of all gaseous elements on both side and 2. How change in temperature will affect the equilibrium

There are 4 moles on the left and 2 on the right ..

making it 4 : 1

so...increase in temperature will shift the equilibrium to the favour the reaction with fewer molecules thereby shifting it right ...the reverse is the case as to decrease in temperature

however; increase in temperature ...if it's an endothermic reaction having a positive sign...tge equilibrium will shift to the right and there will be increase in Kthe reverse also is the case as to an exothermic reaction where delta h is negative -ve