What are the requirements for chemical synthesis,and how do changes in conditions affect equilibrium and the laws governing it?

(N/A) The principal goals of chemical synthesis are $(i)$ to maximize the yield of products and $(ii)$ to minimize the expenditure of energy.
This implies achieving maximum yield under mild temperature and pressure conditions. If this is not achieved,experimental conditions must be adjusted. For example,in the Haber process for the synthesis of ammonia from $N_2$ and $H_2$,the choice of experimental conditions is of significant economic importance.
The equilibrium constant,$K_c$,is independent of initial concentrations. However,if a system at equilibrium is subjected to a change in the concentration of one or more reacting substances,the system is no longer at equilibrium. $A$ net reaction occurs in a direction that allows the system to return to equilibrium.
Changes in temperature or pressure can also alter the equilibrium state.
To predict the effect of changing conditions on equilibrium,$Le \ Chatelier's$ principle is used.
$Le \ Chatelier's$ principle states: "$A$ change in any of the factors that determine the equilibrium conditions of a system will cause the system to change in such a manner as to reduce or counteract the effect of the change." This principle is applicable to all physical and chemical equilibria.