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Video Thermodynamics 1
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  Thermodynamics 4

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Here we have it again, the warming-up process of water. On the left of the diagram, coming up from deep minus-degrees, the temperature of the ice reaches 0 C. It takes a while now, until all the ice has melted and until it has, the temperature doesn't change. The now added amount of warmth is also called solidification-warmth, because, in the reverse process of course, it is once again released.

The following additional heat, once again achieves a temperature increase. It goes on like this up to 100 C. Of all substances, water needs almost the most evaporation-heat, more than 5 times as much as from 0 to 100 C. It is perhaps, more understandable, if one considers the fact that the H0-molecules now take up 1.700 times as much space. Only after all the water has evaporated, does the added heat again cause a rise in temperature.

So, at this point we can again describe the complete process, this time from the molecular aspect. From the absolute rigidity at -273 C, the molecule-movement is set off by the added warmth- or energy. The higher the temperature, the faster the molecules oscillate, always at the same amplitude and all together, covering all directions.

The first peculiarity occurs at 0C, when the molecules give up their solid structure in favour of a less solid, indeed still existing structure. The second change occurs at 100 C, where the molecules finally leave the fomation. The difference is significant because basically, water, always obeying the laws of gravity, gathers at the bottom of a container, whereby steam, will fill the entire available space, regardless of how large it is. 09/13

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Translator: Don Leslie - Email:

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