- °ENTROPY AND FREE ENERGY -Using reaction free energy to predict equilibrium co
ID: 560789 • Letter: #
Question
- °ENTROPY AND FREE ENERGY -Using reaction free energy to predict equilibrium composition Consider the following equilibeium: Now suppose a reaction vessel isfiled with 0.151 atm of chlorine (C2) and 1.27 atm of nitrosyl chloride (NOCI) at 235. °C. Anwrhefolowing questions about this system: Under these coeditions, will the pressure of C12 temd to rise or fall rise all ls it possible to reverse this tendency by adding NO ln other wonds, if you said the pressure of Cl, will tend to rise, can that be charged to a bc changed to atendency to rise by adding NO If you said the lendency can be reversed in the second question,calculate the minimam of NO neoded to revene i Round your mwer so 2 sigc gExplanation / Answer
under these conditions pressure of Cl2 tend to rise
yes , it is possible to reverse the tendency by adding NO
DG0 = - RTlnk
-41*10^3 = -8.314*508.15lnkp
Kp = 1.64*10^4
Kp = pNOCl^2/pNO^2*pCl2
(1.64*10^4) = (1.27-x)^2/((x^2*(0.151-(x/2)))
x = 0.3
at equilibrium,
pNOCl = 1.27-0.3 = 0.97 atm
pNO = x = 0.3 atm
pCl2 = 0.151 -(0.3/2) = 0.001 atm
minimum pressure required to reverse the process is above 0.3 atm
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