O ENTROPY AND FREE ENERGY Using reaction free energy to predict equilibrium comp

Question

O ENTROPY AND FREE ENERGY Using reaction free energy to predict equilibrium compo. Consider the following equilibrium Now suppose a reaction vessel is filied with 368 atm of chlonne (C) and 6.0% am of nitrosyi cthlonde (NOCI) at 1130. C. Answer the folwing questions alo about this system: o roe Under these conditions, wiäl the pressure of CI, tend to nse or fau? Is it possible to reverse this tendency by adding NO In other words, W you said the pressure ot CT, win tend to rise, can that changed to a tendency to fall by adding NO? simaary, if you said the pressure of Cl 2 wili tend to fal, can that be changed to a tendency to rise by adding NO yes the minimum pressure of NO needed to reverse n

Explanation / Answer

Q1.

since there is no NO added, then, the reaction must go reverse, in order to add more NO, thereofre, Cl2 must increase as well, since NOCl will form reactants

therefore, "rise"

Q2

yes, we can, we must add NO

Q3

K = exp(-DG/(RT)) = exp(-41000/(8.314*(1130+273)) = 0.02975

then

K = P-NOCl^2 / (P-NO^2)(P-Cl2)

0.02975 = 6.08^2 /((P-NO^2))(3.968)

(P-NO^2) = (6.08^2)/(3.968)/0.02975

P-NO= sqrt(313.147) = 17.69 atm

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