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CBSE Class 11-science Answered

what is the effect of increase in temperature on the density of water? explain. and relate the concept with the aquatic animals
Asked by | 05 May, 2012, 11:13: AM
answered-by-expert Expert Answer
Temperature affect water density. When the temperature is high, molecules in water disperse and move around more rapidy than they usually do in order to spread the heat energy. But when the temperature is low, water molecules move less and lose energy, and because of this, the space that they move in becomes smaller. Since there is less space and yet the same number of molecules, the density increases. This is why coffee is less hot at the bottom than at the top; the less hot molecules of the coffee are heavier than the hotter ones, and they settle at the bottom.

In summary: Colder temperature=more density
Higher temperature=less density
Answered by | 07 May, 2012, 11:45: AM

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