Question: Consider the temperature versus composition diagram for a binary system of substances A and B: Initially, the mixture is at 72 o C and the

Consider the temperature versus composition diagram for a binary system of substances A and B:

100 vapor 90 temperature (?C) 80 a liquid + vapor B liquid + vapor a liquid B liquid 70 a liquid + ? liquid 60 0.0 0.2 0.4 0.

Initially, the mixture is at 72 C and the molar fraction of B is equal to 0.1.

a) The number of phases and the initial composition of the system.

b) The number of phases and their composition when the molar fraction of B is increased to 0.3.

c) The number of phases and their composition when the molar fraction of B is increased to 0.6.

d) The number of phases and composition of the system when the solution of item c is heated at 76.8 oC.

e) The number of phases and composition of the system when the solution of item c is heated at 80.0 oC


100 vapor 90 a liquid + vapor 80 B liquid + vapor 70 a liquid + B liquid 60 0.0 0.2 0.4 0.6 0.8 1.0 mole fraction B temperature (C) a liquid B liquid

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