Question

why hot water heavier than cold water?

Answer 1

Hot water is lighter than the same volume of cold water, not heavier. The reason for the decrease in density as the temperature increases is that the water molecules cannot get so close together at higher temperatures. The molecules have more kinetic energy and take up more space as they move around in the liquid.

Answer 2

Here your answer friend
Hot water is lighter than the same volume of cold water, not heavier. The reason for decrease in density as the temperature increases is that the water molecules cannot get close together at higher temperature.
Hope this helps you friend
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