Does oily soup cool faster or slower?

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SUMMARY

Oily soup cools slower than non-oily soup due to the insulating properties of the oil layer, which reduces evaporative cooling. The discussion highlights that a surface covered in grease protects the hot soup from losing heat through evaporation, resulting in a slower cooling rate. This conclusion is supported by the understanding of heat transfer mechanisms in liquids, particularly in culinary contexts.

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Does oily soup cool faster or slower? Why?
 
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quantum123 said:
Does oily soup cool faster or slower? Why?

I have my ideas, involving evaporate cooling. What are yours?
 
Come on!
I understand curiosity: 'why'.
But haven't you ever eaten different soups?
Such experimental laws had to be discovered as our ancestors cooked the mammooth broth or lenten turnip soup when they failed to hunt any mammoth...

If the surface is covered by grease it protects hot soup from evapourating water. So it loses much less heat than lenten soup.

[ it's a time to prepare something for dinner... ]
 
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