Le Châtelier's Principle states that when a system is subject to stress, the equilibrium will shift in such a way as to minimise the effect of that stress.
Consider the reaction between nitrogen and hydrogen to form ammonia:
     N_2(g) + 3H_2(g) ⇋ 2NH_3(g) ΔH = -92.4 kJ mol^-1

Answer the following questions by choosing from the dropdown menu:
1. What happens to the concentration of ammonia when the concentration of nitrogen [N₂] is increased? Concentration of hydrogen decreasesConcentration of hydrogen increasesConcentration of nitrogen decreasesConcentration of nitrogen increasesLess ammonia is formedMore ammonia is formed
2. What happens to the concentration of hydrogen when the pressure on the system is decreased? Concentration of hydrogen decreasesConcentration of hydrogen increasesConcentration of nitrogen decreasesConcentration of nitrogen increasesLess ammonia is formedMore ammonia is formed
3. What happens to the concentration of hydrogen when the temperature of the system increases? Concentration of hydrogen decreasesConcentration of hydrogen increasesConcentration of nitrogen decreasesConcentration of nitrogen increasesLess ammonia is formedMore ammonia is formed
4. What happens to the concentration of hydrogen if nitrogen is added? Concentration of hydrogen decreasesConcentration of hydrogen increasesConcentration of nitrogen decreasesConcentration of nitrogen increasesLess ammonia is formedMore ammonia is formed
5. What happens to ammonia when we decrease the pressure on the system? Concentration of hydrogen decreasesConcentration of hydrogen increasesConcentration of nitrogen decreasesConcentration of nitrogen increasesLess ammonia is formedMore ammonia is formed
6. What happens to the concentration of ammonia if the temperature is increased? Concentration of hydrogen decreasesConcentration of hydrogen increasesConcentration of nitrogen decreasesConcentration of nitrogen increasesLess ammonia is formedMore ammonia is formed
7. What happens to the concentration of nitrogen if more hydrogen is added? Concentration of hydrogen decreasesConcentration of hydrogen increasesConcentration of nitrogen decreasesConcentration of nitrogen increasesLess ammonia is formedMore ammonia is formed
8. What happens to the concentration of nitrogen if the volume of the container is made smaller? Concentration of hydrogen decreasesConcentration of hydrogen increasesConcentration of nitrogen decreasesConcentration of nitrogen increasesLess ammonia is formedMore ammonia is formed