Question about sub-cooling

[seanf]

If energy was absorbed from the vapour, either the sub cooled liquid would rise in temperature or if the liquid is at saturation point a small proportion would convert to vapour, without a temperature change.

If the liquid is at saturation and absorbing energy from the vapour and the liquid below the vapor liquid interface would you not end up with the liquid below being cooled?

[mad fridgie]

If the liquid is at saturation and absorbing energy from the vapour and the liquid below the vapor liquid interface would you not end up with the liquid below being cooled?

I think you are looking at 2 possible different points,
1; changes in pressure (like after an expansion valve), where it uses the heat of itself to boil itself, reducing the temperature.
2; Absorption, simalar to when you wet your finger and becomes colder, and is not near saturation.

[seanf]

I think you are looking at 2 possible different points,
1; changes in pressure (like after an expansion valve), where it uses the heat of itself to boil itself, reducing the temperature.
2; Absorption, simalar to when you wet your finger and becomes colder, and is not near saturation.

Thats me just asked a daft question, and probably onto another.

If the liquid and vapour is at saturation there would be no heat transfer. But would you get an energy transfer if the vapour and liquid is trying to get there states into equilbrium? So energy added to the liquid surface from the vapour and no cooling below because of no energy being transfered from the liquid below.