Vapor pressure for n-hexane (C6 H14) and n-pentane (C7 H16) may be calculated from the Antoine’s equation: log 10 P* = A – B / (T+ o C) Where A, B, C are the constants as follows: For n-hexane: A =...

Vapor pressure for n-hexane (C6 H14) and n-pentane (C7 H16) may be calculated from the Antoine’s equation:

log₁₀
P* = A – B / (T+
^oC)
Where A, B, C are the constants as follows:
For n-hexane: A = 7.0151, B = 1246.33, C = 232.988
For n-heptane: A = 6.90253, B = 1267.818, C = 216. 823
P* = vapor pressure in mm Hg
T = temperature in °C

1- Find the normal boiling point temperature, Tb, of n-hexane in °C
a) From standard data.
b) From Antoine’s equation above

2- How many moles of n-heptane should be added to 1 mole of n-hexane to increase the normal boiling point (also called bubble point) of the solution to 80 °C. Assume Raoult’s law is applicable.

3- In question 2, find composition of the bubble in mole fractions.