Here are some friends with simlar question as we.And I have this question for many days,anyone help us?
Kitty said: Yes.Why milk rises up when its boiled?-I try seach this on internet but no results found.Maybe this is a stupid question.
Mike said: oh,no,you are wrong.I have found as below for this question(Why milk rises up when its boiled?),it will help you,my kids.
when milk is boiled it spills out of the container- why so? and is there any solution for that.
Answer:
Unlike water, milk is not a simple liquid. It is a colloid and contains many substances in suspended form. These substances are mainly protein, sugar and fat. When milk is heated slowly, the proteins and fat get separated. Since they are lighter than the milk they collect on the surface in the form of a layer called cream.
Milk also has a large quantity of water in it. During heating some water gets converted into water vapour. The water vapour being lighter, rises up.
As the upper layer of the milk is covered with cream, the vapour gets trapped below it. As the milk is heated further, the water vapour expands and thick foam is produced on top.
Finally, the trapped vapour lifts the layer of cream up, quite like a hot air balloon, and finally bursts through this layer. As the vapour escapes, a lot of cream and milk spill out.
It is very easy to prevent milk from spilling. All one has to do is to provide a path for the vapour to escape. For this we can keep a long-handled spoon in the milk container so that water vapour is able to escape along the handle of the spoon. This prevents the vapour from getting trapped under the layer of cream and thus spilling over of milk.
The fat in milk floats on the top like oil in water so when you bring it to a boil the oily fat turns frothy and expands so much it boils over. Use a bigger pot with less milk or stand there and stir it the whole time until it boils ( takes forever when you watch it )
Milk contains fat globules between the water. When milk is whole the is much more fat in it than skim. When the fat heats up, it expands, hence causing it to need more space. When the water is all evaporated from the boiling milk, only the fat remains. This fat burns very quickly, then usually you pot is ruined next.
i realy dont know the reason for that, but if you dont want it to happen just give it away before it gets that hot to rise up
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Kitty said: Yes.Why milk rises up when its boiled?-I try seach this on internet but no results found.Maybe this is a stupid question.
Mike said: oh,no,you are wrong.I have found as below for this question(Why milk rises up when its boiled?),it will help you,my kids.
when milk is boiled it spills out of the container- why so? and is there any solution for that.
Answer:
Unlike water, milk is not a simple liquid. It is a colloid and contains many substances in suspended form. These substances are mainly protein, sugar and fat. When milk is heated slowly, the proteins and fat get separated. Since they are lighter than the milk they collect on the surface in the form of a layer called cream.
Milk also has a large quantity of water in it. During heating some water gets converted into water vapour. The water vapour being lighter, rises up.
As the upper layer of the milk is covered with cream, the vapour gets trapped below it. As the milk is heated further, the water vapour expands and thick foam is produced on top.
Finally, the trapped vapour lifts the layer of cream up, quite like a hot air balloon, and finally bursts through this layer. As the vapour escapes, a lot of cream and milk spill out.
It is very easy to prevent milk from spilling. All one has to do is to provide a path for the vapour to escape. For this we can keep a long-handled spoon in the milk container so that water vapour is able to escape along the handle of the spoon. This prevents the vapour from getting trapped under the layer of cream and thus spilling over of milk.
The fat in milk floats on the top like oil in water so when you bring it to a boil the oily fat turns frothy and expands so much it boils over. Use a bigger pot with less milk or stand there and stir it the whole time until it boils ( takes forever when you watch it )
Milk contains fat globules between the water. When milk is whole the is much more fat in it than skim. When the fat heats up, it expands, hence causing it to need more space. When the water is all evaporated from the boiling milk, only the fat remains. This fat burns very quickly, then usually you pot is ruined next.
i realy dont know the reason for that, but if you dont want it to happen just give it away before it gets that hot to rise up
correctness,It's Non-profit and only for informational purposes.
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