Why does my hot cup of water boil over when I put my spoon in it? It was not boiling before I put the spoon in
The water had been boiling before I took it off the stove.
Answer:
In the cup, the water molecules are moving by convection current. (Warm water, being less dense will rise and cool water being less dense will sink.)
The metal spoon, a good conductor of heat, conducts heat from the rising warm water due to convetion current. This creates a region around the spoon where there is greater heat energy.
The water molecules around the spoon thus have enough energy to overcome the forces of attraction between them (mainly Hydrogen bonds) and "starts to boil".
there were no nucleation sites
excelllent answer by death in a blink!!
i wouldn't have thought of that. brilliant.
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Answer:
In the cup, the water molecules are moving by convection current. (Warm water, being less dense will rise and cool water being less dense will sink.)
The metal spoon, a good conductor of heat, conducts heat from the rising warm water due to convetion current. This creates a region around the spoon where there is greater heat energy.
The water molecules around the spoon thus have enough energy to overcome the forces of attraction between them (mainly Hydrogen bonds) and "starts to boil".
there were no nucleation sites
excelllent answer by death in a blink!!
i wouldn't have thought of that. brilliant.
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