To determine the effect of temperature on the equilibrium of this reaction, we need to consider the reaction's enthalpy change H . The given reaction is an exothermic reaction, meaning it releases heat H < 0 when ammonia NH3 is formed from nitrogen N2 and hydrogen H2 .According to Le Chatelier's principle, if a system at equilibrium is subjected to a change in temperature, pressure, or concentration of reactants and products, the system will adjust its equilibrium position to counteract the change.In this case, when the temperature is increased, the system will try to counteract the change by shifting the equilibrium position to the endothermic side the side that absorbs heat . For the given reaction, the endothermic side is the reverse reaction formation of N2 and H2 from NH3 .As a result, the equilibrium will shift to the left, favoring the formation of N2 and H2. This means that the concentration of NH3 at equilibrium will decrease when the temperature is increased. Additionally, the equilibrium constant Kc will also decrease as the reaction shifts to favor the reactants.