When distilling toluene and benzene under equilibrium conditions can equilibrium be maintained if a) pressure is changed and if b) pressure and temp are changed? Explain by phase rule© BrainMass Inc. brainmass.com December 24, 2021, 4:59 pm ad1c9bdddf
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Gibbs' phase rule can be expressed as:
F = c - p + 2
where, F is the number of degrees of freedom, c is the number of components in the system, and p is the number of phases in the system.
Here we are having a nearly ideal mixture of toluene and benzene. Therefore we have C = 2, p = 2 (one liquid and one vapour)
F = 2 ie, at any given pressure and temperature, composition of each phase is fixed (by the compositions of liquid and vapor at each end of a tie line).
Thus there is only one possible pressure for each temperature and the answer is yes with b.