|Jul28-12, 02:56 PM||#1|
How to do a T vs Q Diagram?
1. The problem statement, all variables and given/known data
Carbon dioxide (CO2) is an interesting substance. It has no liquid phase at normal pressure; it sublimates rather than melts, going directly from the solid form (dry ice) to a vapor. This sublimation occurs at -78.5°C with a latent heat of sublimation (similar to a heat of vaporization) of 573,100 J/kg. Draw the phase diagram (T vs. Q) for a 1kg sample of carbon dioxide that covers the temperature range from -125°C to -25°C.
3. The attempt at a solution
I've seen T vs P diagrams, and P vs V diagrams, but I have no idea how to construct a T vs Q diagram. I have to work off of the fact that Q in this case refers to the amount of heat required to raise the temperature, but I'm not sure how to go about doing that. Help please?
|Jul28-12, 05:30 PM||#2|
Oh, nevermind I figured it out. In case anyone else is doing something similar to this, this will help http://www.kentchemistry.com/links/E...porization.htm
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