How solubility of oil in water is effected by temperature?

Question

I think oil will be less soluble in water in high temperature. Oil is not soluble in water because it is not favoured by entropy change, so we cannot make oil soluble just by changing temperature. Rather increasing temperature would remove energy barrier and decrease solublity.

What do you think?

Answer 1

oil is still less dense than water, so even if we increased the temperature, it does not make it soluble in water. It is only in cases where more salt or sugar can be dissolved in water when temperature increases.

Increasing the temperature would just cause the water to dry up. I don't see the connection with energy barrier. Isn't that for reactivity?

EDIT: You don't have to bash my answer. I didn't expect this to be advanced chemistry, since we're just talking about solubility. Nice going with the honors, pal.

Answer 2

Both of the answers above are poorly written and dead wrong.  Mixtures of oil and water do not mix because of the hydrophobic effect, they can form better interactions with one another than with the other molecule. This is an enthalpic condition, but if we can overcome this withnentropy, then our free energy will be favorable.  Remember Gibbs! ie:

delta G = delta H - T * delta S  <--Negative = spontaneous!

So, the two liquids physical structure determines delta H the enthalpy.  So, if we increase T to overcome the delta H term, then eventually, the oil will be more soluble.  

In closing, increasing temperature does not instantly increase solubility.  There comes a point where the temperature (entropic) condition overcomes the enthalpic condition and the oil will become more soluble.  

Answer 3

I think that your suggestion is very good and it is avery good idea but it can noy be placed at lower level it shoud want ahigher level plan like  "plasma plan" . and as my knowledge this project is going in some type of lab.