chegg.conm b image-4jpeg Q Search 19) Which of the folloexigs Fal Page 2s A) The

Question

chegg.conm b image-4jpeg Q Search 19) Which of the folloexigs Fal Page 2s A) The activanon enersyás approximately 25 k3 B) Tas t Poiatsu the diagon represeats the actirated comples D) The energy of the products is lorer than the energy of the reactants Aaswer Tbe reaction shon below is ar Use Lç Chateiers pnisciple to predict the etfect of sdding amumonia gas to the equulibrium reaction muchure A The equilibrium posinon wil reaaid uochanged B) Tbe eqoulibrins position will shuh to the nighn 2 Al of the amopm paw will bé sied p will shuft to the lef D) The equulibrins constaut will acrease 2

Explanation / Answer

(19) From the given energy diagram, energy level of reactants is above the products, that means reactants energy is higher than products energy so the reaction is exothermic and heat is given out.

delta Hrxn = delta H of products - delta H of reactants

delta Hrxn = 25kJ - 75 kJ = - 50 kJ

given delta H in the choices is -25 kJ which is not correct. So, choice (E) is false.

Acrivation energy is the energy gap between activated complex and reactant energy.

activation energy = 100 kJ - 75 kJ = 25 kJ

So, all the other choices are true except choice (E).

(20) given equation is...

N2(g) + 3H2(g) <-----------> 2NH3(g)

According to Le-Chalelier's principle, we add something then it must be used up. for example of we add N2(g) then reaction would shift to the right so that this added gas could be used.

in this problem, we are asked what would happen if NH3(g) is added. in the given equation we have this gas on product side(right side). So, if this gas is added then reacion would sift to the reactant side(left side).

So, the correct choice is (C), "The equilibrium position will shift to the left."

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