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Substance evaporation temperature

by indianaronald
Tags: evaporation, phase change, saturation
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indianaronald
#1
Jan20-13, 01:50 AM
P: 21
Can a substance only evaporate at the T(sat) at that particular pressure and why not even at a higher temperature?
Example of a refrigerant at room temperature, pressurized container. But when it's opened, the P falls and T(sat) falls, so it goes to that T(sat) temperature to evaporate. But why? Why not evaporate at the room temperature itself?
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mfb
#2
Jan20-13, 05:34 AM
Mentor
P: 11,837
Evaporation reduces the temperature of the surface until you have an equilibrium (or something close to it) at the surface.


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