The chemical reactions differ primarily in the speed at which they take place. Some take years to attain equilibrium, while some are basically instantaneous. The rate of reaction of a given chemical reaction is the determination of the change in the concentration of the products or the change in the concentration of the reactants per unit time.
With time, as the reaction reaches dynamic equilibrium, the concentration of the reactants, that is, A and B reduce and the concentration of the product, that is, C elevates. This is due to the fact that the chemical reactions seem to shift towards the product(s) end.
Over time, as the reaction approaches dynamic equilibrium, the concentrations of A and B will decrease and the concentration of C will increase. This is because chemical reactions tend to shift towards the side of the product(s).
An exothermic reaction is one in which heat is liberated to the surrounding by a reaction.In this case,the enthalpy of the product is less than that of the reactant and such a reaction has a negative enthalpy (ΔH).
