chemistry

At 20. °C, the vapor pressure of toluene is 22 millimeters of mercury and that of benzene is 75 millimeters of mercury. An ideal solution, equimolar in toluene and benzene, is prepared. At 20. °C, what is the mole fraction of benzene in the vapor in equilibrium with this solution?

1. 👍 0
2. 👎 0
3. 👁 150
1. The mole fraction of each component = 0.5
The vapor pressure of the mixture is:
P = (0.5)(22) + (0.5)(75) = ____ mm
X(benzene vapor) = P(benz. vapor)/P
X(benzene vapor) = (0.5)(75)/P

1. 👍 0
2. 👎 0
posted by GK
2. .77

1. 👍 0
2. 👎 0
posted by David

Similar Questions

1. Math

In a study of 800 men,diastolic blood pressure was found to be approximately normally distributed, with a mean of 84 millimeters (mm) of mercury and standard deviation of 10 millimeters. Use the 68-95-99.7% rule to determine what

asked by Joe on December 15, 2016
2. Math 1

In a study of 500 men, diastolic blood pressure was found to be approximately normally distributed, with a mean of 82 millimeters (mm) of mercury and standard deviation of 10 millimeters. Use the 68-95-99.7% rule to determine what

asked by Amy on December 15, 2016
3. chemical

The vapor pressure of mercury at 77¢K is 0.0018 mmHg. The atomic weight of mercury is 200.6 g/mole. If the mercury vapor were allowed to reach equilibrium at this temperature in an enclosed space, what would be the mercury vapor

asked by steve on October 8, 2011
4. Chemistry (daltons law of partial pressure)

A mixture of toluene and water boils at 90 C, calculate the vapor pressure of toluene at this temperature. Assume the atmospheric pressure to be 760 mmHg. And secondly calculate the molar mass of toluene.

5. Chemistry

How do I find the total vapor pressure of a solution of benzene (mole fraction 0.350, vapor pressure at 25 degrees = 12.7 kPa) in toluene at 25 degrees. (vapor pressure of toluene at 25 degrees = 3.79 kPa)

6. Chemistry

Calculate the vapor pressure of a solution of 0.48 mol of cholesterol in 6.0 mol of toluene at 32°C. Pure toluene has a vapor pressure of 41 torr at 32°C. (Assume ideal behavior.)

asked by Stevi on February 16, 2013
7. chemistry

calculate the vapor pressure of a solution 0.53 mol of cholestrol in 4.1 molof toluene at 32 degree C. pure toluene has a vapor pressure of 41 torr at 32 degree C

asked by courtney on April 28, 2014
8. chemistry

At a given temperature, you have a mixture of benzene (vapor pressure of pure benzene = 745 torr) and toluene (vapor pressure of pure toluene = 290 torr). The mole fraction of benzene in the vapor above the solution is 0.590.

asked by renee on February 22, 2012
9. Chemistry

A student breaks a thermometer and spills most of the mercury (Hg) onto the floor of a laboratory that measures 15.2 m long, 6.6 m wide, and 2.4 m high. (a) Calculate the mass of mercury vapor (in grams) in the room at 20°C. The

asked by Hay on August 19, 2013
10. Chemistry

What is the vapor pressure in Torr above a solution prepared by mixing 66.73g of benzene C6H6 with 63.26g toluene C6H5CH3 at 20 Celsius. The vapor pressure of pure benzene and toluene at 20celsius are 75 and 22 torr respectively.

asked by Jude on April 23, 2011

More Similar Questions