explain the reason

Question

Explain ‘chemical equilibrium’ and ‘Le Chatelier’s principle’ ,respectively.Now changes of the reaction conditions A or B are given to the chemical reaction eq.①.
Which direction does the chemical equilibrium(eq. ①)shift to?
To right (forward reaction) or to left (reverse reaction)?And explain the reason.

N₂+3 H₂⇄2 NH₃⋯① A: to remove ammonia

                            B: to reduce pressure

Answer 1

Chemical equilibrium is when the rate of formation of products is equal to the rate of formation of reactants. That is, the rate of the forward and reverse reactions are the same.

Le Chatelier's principle basically says that the system will respond to changes when at equilibrium by trying to remove that change. Or put another way, when a system experiences a disturbance (such as concentration, temperature, or pressure changes), it will respond to restore a new equilibrium state.

 

Not sure what you are asking with respect to N₂+3 H₂⇄2 NH₃

What is the 1 in a circle supposed to mean?

If you remove NH3, then the equilibrium will shift to the right to try to replace the NH3 that was removed.

If you reduce the pressure, the equilibrium will shift to the left because there are more moles of gas (4) on the left than on the right (2).