An equilibrium mixture of N₂(g) + 3H₂(g) ⇌ 2NH₃(g) has [N₂] = 0.500 mol/L, [H₂] = 1.00 mol/L and…
Contributed by StemPy LabTry it on paper first. A hint, the key idea and the worked solution are here when you need them.
An equilibrium mixture of has mol/L, mol/L and mol/L. Find . The volume is then halved at constant temperature. Find just after, and say which way the mixture shifts.
Need a reminder? The key ideaShow
Le Chatelier: a disturbed equilibrium shifts to undo part of the change. Adding a reactant or removing a product shifts it forward. Higher pressure favours fewer moles of gas. Heating favours the endothermic direction and changes K. A catalyst does not shift the equilibrium.
The worked solution
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Work it out on paper first. It is fine to get stuck or make a mistake: that is how we learn. When you are ready, go through the solution one step at a time, and check each step against your own.
Step 1. Kc. .
Step 2. After the squeeze. The concentrations become , and mol/L.
Step 3. Qc. .
Step 4. Compare. , so the mixture shifts forward, towards fewer moles of gas.
Answer: ; ; more ammonia forms.
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