why water has maximum density at 4 degree centigrade

1.	why water has maximum density at 4 degree centigrade
Answer» Water has maximum density at 40C because when temperature is increased from o to 40C, some of the H-bonds break and molecules come closer and density increases till 40C because volume decreases. But, above 40C, the kinetic energy of molecules increases which leads to increase in volume and density decreases.

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