Chemistry - Chemical Equilibrium Question with Solution | TestHub
In an evacuated vessel of capacity 73.8 L, 3 moles of Ne(g) and 4 moles of SO2Cl2(g) were introduced and the temperature is maintained at 400 K. At equilibrium for SO2Cl2(g) ⇌ SO2(g) + Cl2(g) the total pressure of the mixture was found to be 4.0 atm. (R = 0.082 L atm/mol/K)
Options:(select one or more)
Answer:
Solution:
ntotal = PV/RT = (4.0)(73.8)/[(0.082)(400)] = 9, so (c) is wrong Let x mol dissociate: 3 + (4 - x) + x + x = 9, so x = 2
α = 2/4 = 0.5, so (a) is correct
Moles: SO2Cl2 = 2, SO2 = 2, Cl2 = 2, Ne = 3
Each of the three reacting gases has P = 4.0(2/9) = 8/9 atm
KP = (8/9)(8/9)/(8/9) = 8/9 = 0.89 atm, so (b) is correct
Adding inert gas at constant pressure increases the volume, which favours more gas moles, so dissociation increases and (d) is wrong
The correct statements are (a) and (b).
