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Question 2 (25 marks) Construct a Txy diagram for a mixture of ethanol (1) with hexane (2) at a total pressure of 101.3 kPa. Use the Wilson model with the parameters ??? = 0.0952, ??? = 0.2713 Vapor pressure: ($P_{i}^{sat}$ in kPa and T in °K) $\ln P_1^{sat} = 16.1952 - \frac{3423.53}{T - 55.7172}$ $\ln P_2^{sat} = 14.0568 - \frac{2825.42}{T - 42.7089}$ Page 1 of 2 Hint: • Use Microsoft Excel • To construct a Txy diagram, start with a value of x? between 0-1, for example, x? = 0.002. The problem becomes bubble point temperature calculation. • Use the boiling point of hexane as the initial guess for the bubble point temperature of the mixture. • After each bubble point calculation, increase x? by a small amount and repeat the calculation.

          Question 2 (25 marks)
Construct a Txy diagram for a mixture of ethanol (1) with hexane (2) at a total pressure of
101.3 kPa. Use the Wilson model with the parameters
??? = 0.0952, ??? = 0.2713
Vapor pressure: ($P_{i}^{sat}$ in kPa and T in °K)
$\ln P_1^{sat} = 16.1952 - \frac{3423.53}{T - 55.7172}$
$\ln P_2^{sat} = 14.0568 - \frac{2825.42}{T - 42.7089}$
Page 1 of 2
Hint:
• Use Microsoft Excel
• To construct a Txy diagram, start with a value of x? between 0-1, for example,
x? = 0.002. The problem becomes bubble point temperature calculation.
• Use the boiling point of hexane as the initial guess for the bubble point
temperature of the mixture.
• After each bubble point calculation, increase x? by a small amount and repeat
the calculation.

Question 2 (25 marks)
Construct a Txy diagram for a mixture of ethanol (1) with hexane (2) at a total pressure of
101.3 kPa. Use the Wilson model with the parameters
??? = 0.0952, ??? = 0.2713
Vapor pressure: (Pi^sat in kPa and T in °K)
ln P1^sat = 16.1952 - (3423.53)/(T - 55.7172)
ln P2^sat = 14.0568 - (2825.42)/(T - 42.7089)
Page 1 of 2
Hint:
• Use Microsoft Excel
• To construct a Txy diagram, start with a value of x? between 0-1, for example,
x? = 0.002. The problem becomes bubble point temperature calculation.
• Use the boiling point of hexane as the initial guess for the bubble point
temperature of the mixture.
• After each bubble point calculation, increase x? by a small amount and repeat
the calculation.

Added by Cristina T.

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