Hot water is heavier than cold water, true or false?

picqero

Water, like most other materials, expands when heated so cold water is denser than hot water and is therefore heavier, assuming the quantities are identical of course. This is why the top of a water heated radiator warms up before the bottom; the warmer water 'floats' on top of the colder water. The same effect is sometimes very evident while swimming in a calm sea or lake, the warmer water being close to the surface. Simply heating any quantity of water, however, will not increase or decrease its weight. Oct 15 05, 12:14 AM

dunnkeeh

Water in its normal state will decrease in density as you increase its temperature. Example, water at 4 degrees Celsius has a density of .99998 g/ml, and at 30 degrees Celsius has a density of 0.9957 g/ml. However there exists the possibility for water to be super cooled. In nature this usually only happens in clouds. But if you cooled it quick enough you could super cool it to -45 degrees Celsius before it froze. Water that is super cooled decreases in density the colder you get. Water that is -30 degrees has a density of 0.9839 g/ml. Feb 20 07, 3:36 PM

Create a Free FunTrivia ID to add to, request more/new answers, or edit this entry

Is it true that when making ice cubes, hot water freezes quicker than cold? Does hot water weigh more than cold water? Why does hot water clean dishes better than cold water? Why is it called a hot water heater...and not a cold water heater?

1 The Essential Hot Water Music A quiz about the greatest rock 'n roll band of all time, Hot Water Music. H Tough 10 Q DammitAlex Jul 16 06 63 plays 2 Water, Water! These questions are on the various bodies of water in the world. Bodies of Water Tough 10 Q mafekinggal May 05 01 2319 plays 3 Water, Water Everywhere "Green Acres" episode: "Water, Water Everywhere" ... farm living is the life for me! Green Acres Very Difficult 10 Q angelmouse Aug 16 05 1119 plays