can i please get some help with this?

Question

For the equilibrium reaction involving the formation of ammonia, which can be described by the reaction below, describe the effect of adding H2 gas to the reaction, increasing the pressure in the reaction, and decreasing the temperature of the reaction.
N2(g) + 3H2(g) <-> 2NH3(g) ΔH = –92.6 kJ
i don't know where to start nor do i get the point of the given delta h

Answer 1

N2(g) + 3H2(g) <-> 2NH3(g) ΔH = –92.6 kJ
Let me rewrite the equation. Since dH is negative that means the reaction is exothermic so we can write N2(g) + 3H2(g) <-> 2NH3(g) + heat

The POINT: This is a question about Le Chatelier's principle. That principle, in what I call "up tight" language is this. When a chemical system in equilibrium is subjected to a stress the reaction will shift in such a direction so as to relieve the stress. Simple. Straight forward. However, few students understand it. Here it is in simpler terms. A chemical system in equilibrium will try to undo what we do to it.
N2(g) + 3H2(g) <-> 2NH3(g) + heat
So we add H2 to the system. Now it has too much. It will try to get rid of the extra H2 that was added. How can it do that? By shifting to the right the reaction will use up the added H2. N2 will decrease. NH3 will increase, It will get hotter.
Add pressure: Remember that increasing pressure of gas makes it want to occupy a smaller volume. You have 4 mols gas on the left side and 2 mols gas on the right side. Which is the smaller volume. The right, of course. So the reaction will move (shift) to the right. N2 will get smaller, H2 will get smaller, NH3 will get larger, it will produce more heat. By now you have the heat thing figured out. If you increase temperature (increase heat) it will shift to the left because by doing that it will use up the heat that was added.
I hope this helps. In my opinion this is the simplest "law" in chemistry but it gives students the most trouble.I love talking about Le Chatelier's principle.

Answer 2

ah thank you so much for the detailed explanation! the delta h was really throwing me off. when explained well and in simpler terms, le chatelier's principle seems to be rather intuitive.