Er. Pravin Aryal
Inspired for Innovation
Can you believe that hot water is heavier than cold water?
Can you believe that hot water is heavier than cold water?
Question: Hot water is heavier than cold water, is true or false?
Generally, it isn’t. Cold water is denser than hot water. Therefore, it is cold water that is heavier than hot water (for equal volumes of water). The same volume of hot water is lighter than cold water, not heavier. Water shows unusual behaviour. There is actually a decrease in the density of water from about 4 degrees Celsius to zero Celsius, because of how the molecules are arranged. However, I don’t think that water at 4 degrees Celsius could be described as hot water.
If you take 1 kg of water just above the freezing point, and you heat it up to just below the boiling point (without letting any escape or evaporate), it will end up with a mass of 1.000000000005 kg ie. more 5 pg than previous water we have taken, because it now has extra thermal energy and E = mc2. This is fun trivia but probably not what the questioner has in mind. 🙂
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