When attempting to mix, the water molecules would have to disrupt their strong hydrogen bonds to accommodate oil molecules, which they cannot do energetically. The system minimizes its overall energy by separating into two distinct phases rather than forcing an energetically costly and weak interaction.
Debunking "Like Dissolves Like" in Oil and Water Mixing
Mayonnaise and vinaigrette are classic examples, but these are inherently unstable without an emulsifier. This universal separation is not a flaw but a predictable outcome of how molecules seek the most stable, lowest energy state.
Entropy and the "Like Dissolves Like" Principle Beyond bond strength, the behavior of molecules is governed by entropy, a measure of disorder. In stark contrast, oil is typically non-polar, consisting of long hydrocarbon chains where electrons are shared more evenly.
Debunking "Like Dissolves Like" in Oil and Water Separation
Oil molecules, being non-polar, are held together by much weaker London dispersion forces. This structure spontaneously forms a bilayer in water, creating a stable barrier that separates the cell's interior from the external environment.
More About Why doesn't oil and water mix
Looking at Why doesn't oil and water mix from another angle can help expand the discussion and give readers a second clear paragraph under the same section.
More perspective on Why doesn't oil and water mix can make the topic easier to follow by connecting earlier points with a few simple takeaways.
