Homework Help: chem

Posted by Anonymous on Sunday, November 14, 2010 at 9:23pm.

A 4.1 L sealed bottle containing 0.25 g of liquid ethanol, C2H6O, is placed in a refrigerator and reaches equilibrium with its vapor at -11°C. The vapor pressure of ethanol is 10 torr at -2.3°C and 40 torr at 19°C.
(a) What mass of ethanol is present in the vapor?

chem - DrBob222, Sunday, November 14, 2010 at 10:37pm
Step 1. Use the Clausius-Clapeyron equation to solve for delta Hvap/mol.

Step 2. Knowing delta Hvap/mol for ethanol, calculate vapor pressure of ethanol @ -11 C.

Step 3. Use PV = nRT to solve for n =number of moles of ethanol vapor at -11 C.

Step 4. moles = grams/molar mass
Solve for grams.

Check my thinking. Post your work if you get stuck.
chem - 123, Wednesday, February 8, 2012 at 10:21pm
how to use the Clausius-Clapeyron equation in this question?

Answer this Question

Related Questions

College Chemistry - 1. From data below, calculate the total heat (in J) ...
College Chemistry - 1. From data below, calculate the total heat (in J) ...
College Chemistry - 1. From data below, calculate the total heat (in J) ...
CHEMISTRY - if a pure liquid in a sealed container is in equilibrium with its ...
Chemistry - What is the relationship between the equilibrium and changes of ...
Chemistry - A solution is made by mixing 30.0 mL of ethanol, C2H6O, and 70.0 mL ...
chemistry - Water has an equilibrium vapor pressure of 23.8 mm Hg at 25 C. If 1....
ap chemistry - methanol and ethanol are common organic solvents. if the mole ...
chem - A liquid that has an equilibrium vapor pressure of 129 torr at 25°C ...
physics - A sealed glass bottle containing air at atmospheric pressure (101kPa) ...

For Further Reading

First Name:
School Subject:
Answer: