Olive oil is a monounsaturated oil with a melting point of -6 °C. Soybean oil is a polyunsaturated oil with a melting point of -16 °C . Explain their difference in melting points.

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Welcome back. Everyone who cannot oil. A saturated fat solidifies at 25 °C. While corn oil, a poly unsaturated fat remains liquid at room temperature, explain the reason for this difference in the physical states at room temperature. So, from this context, we essentially understand that if coconut oil solidifies a 25 °C, then the melting point of coconut oil, let's call it CEO it is 25 °C. But corn oil, a poorly unsaturated fat remains liquid. Meaning the melting point of corn oil, let's call it cr is essentially lower than 25 °C because it still remains liquid at 25 °C. So it has a lower melting point. Now, we essentially want to understand why this is the case. And we understand that the first one is a saturated fat, meaning it consists of linear chains with no kinks, right? And the second one is a poorly unsaturated fat, which essentially involves multiple double bonds. And what do we know about double bonds? Well, essentially, whenever we have double bonds in our structures, they produce more complex forms, right? If we think about stray chains, they are more closely and more efficiently packed. And a more efficient packing also means more dense because in the same unit of volume, we can detect a larger number of molecules that are more efficiently packed. While for a structure that has kinks right, that are a result of the double bonds in that structure. Well, for such a structure, we can state that it is less efficiently packed and therefore less dance. And we know that if a structure is less dense, well, essentially it will have a lower melting point, a structure that that is more efficiently packed or basically more dense. Well, essentially it will have a higher melting point. So essentially for this problem, we can state that the physical state of these oils at room temperature is determined by the presence or absence of carbon, carbon double bonds right in they are changed, which affects how closely molecules can be packed and therefore melting points. And that would be the complete explanation for this problem. Thank you for watching.

Olive oil is a monounsaturated oil with a melting point of -6 °C. Soybean oil is a polyunsaturated oil with a melting point of -16 °C . Explain their difference in melting points.

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Key Concepts

Fatty Acid Composition

Degree of Unsaturation

Physical Properties of Oils