Q17 to Q22

Dear student ,

please be a little specific and ask question one by one and kindly upload a clear picture. Here i am answering one of the question that you asked.

Le Chatelier's principle says that if a chemical reaction is at equilibrium, and it experiences a change in pressure, temperature, and concentration of products or reactants, the equilibrium shifts in the opposite direction of the change.

for an endothermic reaction, heat is absorbed in the reaction, For an exothermic reaction heat is released in the reaction.  if we increase the temperature on an endothermic reaction, the equilibrium will shift the right. Conversely, decreasing the temperature on an endothermic reaction will shift the equilibrium to the left and For an exothermic reaction, increasing the temperature will shift the equilibrium to the left, while decreasing the temperature will shift the equilibrium to the right.

If Δn < 0, on increasing pressure reaction occurs in forward direction and if Δn > 0 then on increasing pressure reaction occurs in backword direction.for a reaction in which the number of moles of gas on both sides of the equation are equal, the system will be unaffected by changes in pressure, since Δn=0$\mathrm{.}$

On increasing the concentration of reactants, forward reaction and on increasing the concentration of products backword reaction occurs.

Regards,$\mathrm{}$