Thursday, April 15, 2010

E-LEARNING ASSIGNMENT PART 2. (REG,NO.3)

What would happen if the freezing point of water became 10 degrees C?
In a container of ice in it. The ice are at 0°C, which is the melting point of ice and the freezing point of water.
Molecules of ice are constantly escaping into the water (melting), and molecules of water are being captured on the surface of the ice (freezing).
When the rate of freezing is the same as the rate of melting, the amount of ice and the amount of water won't change. The ice and water are said to be in dynamic equilibrium with each other. The ice is melting, and the water is freezing, but both are occurring at the same rate, so there is no net change in either quantity.
This balance will be maintained as long as the water stays at 0°C, or unless something happens to favour one of the processes over the other.  

This time we warm the ice to 10°C.
Now the water molecules are moving more quickly, because they contain much more heat. These faster-moving molecules can't easily be captured by the surface of the ice, so not very many of them freeze. Freezing occurs at a slower rate than melting

Because there are fewer water molecules being captured by the ice (being frozen) than there are ice molecules turning to water, the net result is that the amount of water increases, and the amount of ice decreases.
Since more melting is happening than freezing, the ice eventually all turns to water. 

The countries near the north pole and south pole will most likely freeze up. As the countries are very far away from the equator.

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