The reaction between hydrogen gas H2 and nitrogen gas N2 to form ammonia gas NH3 can be represented by the following balanced equation:N2 g + 3H2 g 2NH3 g This reaction is an example of a reversible reaction, meaning it can proceed in both the forward and reverse directions. The position of the equilibrium can be affected by changes in pressure, temperature, or concentration of the reactants and products.According to Le Chatelier's principle, if a change is made to a system at equilibrium, the system will adjust itself to counteract the change and restore a new equilibrium. In this case, increasing the pressure of the system will cause the equilibrium to shift in the direction that reduces the pressure. Since there are 4 moles of gas on the reactant side 1 mole of N2 and 3 moles of H2 and only 2 moles of gas on the product side 2 moles of NH3 , increasing the pressure will cause the equilibrium to shift towards the side with fewer moles of gas, which is the product side formation of ammonia . This means that the reaction will proceed in the forward direction, producing more ammonia gas.To experimentally verify this effect, you can set up a closed system containing a mixture of hydrogen gas and nitrogen gas, and monitor the concentration of ammonia gas over time. Initially, the system will reach an equilibrium state with a certain concentration of ammonia. Then, increase the pressure of the system and continue to monitor the concentration of ammonia. If the concentration of ammonia increases after the pressure is increased, this would confirm that the equilibrium has shifted towards the formation of ammonia, as predicted by Le Chatelier's principle.