Consider the reaction network of the gaseous isomerisation, decomposition and dimerisation reactions of the same reactant A: Isomerisation: A ⇆ I Decomposition: A ⇆ B + C Dimerisation: 2A ⇆ D At the reaction temperature, the equilibrium constants, expressed in terms of partial pressures, are: Isomerisation: KI = 5 Decomposition: KDe = 0.5 bar
Consider the reaction network of the gaseous isomerisation, decomposition and
dimerisation reactions of the same reactant A:
Isomerisation: A ⇆ I
Decomposition: A ⇆ B + C
Dimerisation: 2A ⇆ D
At the reaction temperature, the equilibrium constants, expressed in terms of partial
pressures, are:
Isomerisation: KI = 5
Decomposition: KDe = 0.5 bar
Dimerisation: KDi = 5 bar-1
At 1 bar, there is only 1 mol of A initially. Express the mole-fraction of each reaction
component at equilibrium as function of the extents of the three reactions at
equilibrium, ξI, ξDe, ξDi.
Calculations resulted in the following values of the extents of the three reactions,
isomerisation, decomposition and dimerization at equilibrium: ξI= 0.5400 mol, ξDe =
0.2553 mol, ξDi= 0.0483 mol.
Calculate the equilibrium mole-fractions of reaction components A, I, B, C and D and
show that the equilibrium extent values are correct.
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