Question

What happens to the properties of water, in particular, density, at sea level when ice melts and the temperature increases to 4 degrees C? Give an example of this in practical terms.

Answer 1

Ans - Water higest density at 4 degree C .If we heat it or cool it ,it will expand the expansion of water when it is cold is very unusual at lower temprature as a property of liquid most liquid contract when they are cooled , 4°C is about the temperature (T) at which liquid water has a minimum volume, at atmospheric pressure, as an expanple we can take that the temperature of water at the bottom of a lake in the winter is almost always 4 degrees C, since the densest water will settle to the bottom -- if it gets any colder or warmer, it will rise. Ice floats on top of lakes, preventing evaporation (and convection in the frozen layer), and lakes stay liquid underneath, allowing fish and other life to survive.