Solution Found!
?-Pinene (C10H6) and ?-terpineol (C10H18O) are used in
Chapter 14, Problem 92P(choose chapter or problem)
Problem 92P
β-Pinene (C10H6) and α-terpineol (C10H18O) are used in cosmetics to provide a "fresh pine" scent. At 367 K, the pure substances have vapor pressures of 100.3 torr and 9.8 torr. respectively. What is the composition of the vapor (in terms of mole fractions) above a solution containing equal masses of these compounds at 367 K? (Assume ideal behavior.)
Questions & Answers
QUESTION:
Problem 92P
β-Pinene (C10H6) and α-terpineol (C10H18O) are used in cosmetics to provide a "fresh pine" scent. At 367 K, the pure substances have vapor pressures of 100.3 torr and 9.8 torr. respectively. What is the composition of the vapor (in terms of mole fractions) above a solution containing equal masses of these compounds at 367 K? (Assume ideal behavior.)
ANSWER:
Solution 92P:
Here, we are going to calculate the composition of the vapor (in terms of mole fractions) above a solution containing equal masses of these compounds at 367 K.
Step 1:
Raoult's law states
“The vapor pressure of a solvent of a solution is equal to the vapor pressure of the pure solvent at the same temperature multiplied by the mole fraction of the solvent present.”
Where vapor pressure of a solution
= Mole fraction of the solvent
= Vapor pressure of a pure solvent.