Benzaldehyde, C6H5CHO}, has a normal boiling point of 179.0 C and a critical point at 422 C and 45.9 atm.
Using a phase diagram, estimate its vapor pressure at 125 Degrees
I don't have a phase diagram for benzaldehyde. Hee is a some links that talk about reading phase diagrams. Perhaps you can find some information here..
ah okay? where are the links? haha
I forgot to post them. :-)
http://www.google.com/search?q=phase+diagrams&ie=utf-8&oe=utf-8&aq=t&rls=org.mozilla:en-US:official&client=firefox-a
i still don't get how to do this -.-
You find the line that divides liquid/gas. At T = 179 you should find the vapor pressure (on the pressure axis) = 1 atm or 760 mm Hg. So read the vapor pressure from that vapor/liquid line at 125. That should be the vapor pressure at that temperature.
To estimate the vapor pressure of benzaldehyde (C6H5CHO) at 125 degrees Celsius using a phase diagram, follow these steps:
1. Obtain a phase diagram of benzaldehyde. This diagram should include the boiling point and critical point information provided.
2. Identify the temperature axis on the phase diagram and locate the point corresponding to 125 degrees Celsius.
3. From this point, draw a horizontal line to the vapor pressure axis.
4. Read the value on the vertical axis where the horizontal line intersects.
By following these steps, you can estimate the vapor pressure of benzaldehyde at 125 degrees Celsius. Keep in mind that this is an estimated value since we are using a phase diagram, and actual experimental data might be more accurate.