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Author Topic: Why does ice form on top of my jelly?  (Read 3372 times)

Luke

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Why does ice form on top of my jelly?
« on: 21/05/2010 00:30:04 »
Luke asked the Naked Scientists:
   
When I make gelatin dessert (Jello here in the US, I think you folks call it jelly), if I leave it in the fridge for a while it will often form a layer of ice on the surface.

My fridge is not freezing... so how come ice forms on the Jello?

What do you think?
« Last Edit: 21/05/2010 00:30:04 by _system »


 

Offline RD

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Why does ice form on top of my jelly?
« Reply #1 on: 21/05/2010 03:15:12 »
Two possibilities spring to mind ..

1. The Mpemba Effect, (warm water can freeze faster then cold water because of evaporation from the warm, removing heat).

2. Possibly the solidification of the Jello is endothermic  [?],
 (bonds form when the jello changes from liquid to solid which remove heat energy,
 making the jello colder than everything else in the fridge).

 
« Last Edit: 21/05/2010 03:21:15 by RD »
 

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Why does ice form on top of my jelly?
« Reply #1 on: 21/05/2010 03:15:12 »

 

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