Question

273 Ammonia reacts slowly in air to produce nitrogen monox- ide and water vapor: NH3(g) + O2(8) 2 NO(g) + H2O(g) + Heat (a) Balance the equation. (b) Write the equilibrium equation. (C) Explain the effect on the equilibrium of (1) Raising the pressure (2) Adding NO(g) (3) Decreasing the concentration of NH3 (4) Lowering the temperature fuel

Answer 1

NH3 693 +029) Nog) + H5295 + heat 4 NH3 + 702 ANO, +6H2D theat Ha a reveasible valtion : As heat is generated, the toward reaction is exothermic and backward caction is endo thermic xidation 4NH₃ +70, exothermic 4 No, to the theat. Reddecierge endothermic agent ordising b) - Reduction agent kea - Concentrating Product ? concentration ceactant - Keq = [kon] * [*079 Her a compensation of adalah [nchy]* [02]? alcoays balance the leaction before writing equilibulum constart ! The cercesnteation is findicated by the squace beacket. The equilibiam reaction above can have kilka as equilibrium constant by considering af forward & backward dicecfrien eraction - & notte +702 a 4 NO2 + 6 420

ere e as ka , as it is the K2 can backcoard also be of the coeuften reaction : Forward : wa ki= [No,] & [60] [only] * [OJ? Kr/k- + [areag* [on]* [Aron] [420] I c The equilibrium Shift takes place according to l i chatelier's principle: It states that if a dynarnic equilibrium is distubed by changing the Conditions, the position of equilibricem Shifts to Counteract the change to leestablish an equilibciem

That is ; If a chemical reaction is at equilibrium and experiences a change. En peesscue, temperaful, od concentcation of products on reactants , the equilibrium Shifts occous anoided to attain equilibrium 'chich coas lost by any change. Summary of Le-chatlies principle : - Change y effect on equilibrium increase concentration Shifts to opposite side decrease concentration Shifts to Same Siche increase pressure Shifts to side with least moles of gas decrease peesscelé I moles of gas Encrease temperature direction Shifts in exothermic direction tempecatau decrease 1 Shifts to side coin most Shifts in endo the comic . .

c) 494, +702 et en 4-10+4440+ heat w when pressure increases the equilibrium e Shifts to side with least moles of gases Ccohen pressive incuiases volume decreases) 80 heel diaction equilibrium shifts in forward dieettion as no. of moles of gaps in the right hand side i n less than left hand side. 2) when increasing the concentration of no the reaction goes to back would direction - that is shifts to opposite side. To decuase of equilibreate the change in concentration 3) On decreasing concentration, the equilibakem Shifts towards the same side. Here when decrease the concentration of NH₃ backward reaction takes place. so as to increase the concentration of NH3 or to equilibriate the reaction » On decuasing the temperature reaction Shifts in exothermic dicection. That is in forward dicection-