I heard this somewhere but don't remember where, any sources, or why it would be true, if it is.
2007-04-07 16:22:55 · 8 answers · asked by Robert 2 in Science & Mathematics ➔ Chemistry
This is a myth. Hot water already has a lot more energy than cold water, and it will therefore take less heat energy to bring the hot water up to the boiling point.
If, however, you were to boil some water and let it cool down, you may find it boils again faster than hot water straight from the tap. This is because the dissolved oxygen in the previously-boiled water has been removed.
2007-04-07 16:31:33 · answer #1 · answered by answerator 5 · 0⤊ 0⤋
NO! This is a common misconception. Cold water has a larger energy gap to cross until it reaches the phase change (boiling) then hot water. if you take water that is 1 C and water that is 80 C and then place them both in a flame that is 100 C the hotter water will boil first. I believe the misconception comes from 1 C water heating up faster then the 80 C water however the 80 C water will reach the phase change faster. If that is too confusing look at it this way, the 80 C water is getting a head start to the 100 C.
2007-04-07 16:33:05 · answer #2 · answered by coderody 2 · 1⤊ 0⤋
I am not sure ,but I know that boiling water freezes faster than cold water something to do with the molecular structure apparently, I guess the same principles apply to your question...
2007-04-07 16:29:32 · answer #3 · answered by Anonymous · 0⤊ 0⤋
I resigned myself to it some time past, buttercup. As any sane and decent guy or woman could anticipate, warm water out of the faucet will boil swifter than chilly water out of the faucet. although, water that has been boiled as quickly as and allowed to kick back will boil swifter than warm water out of the faucet. it incredibly is as a results of the fact boiling removes the dissolved oxygen in many situations contemporary in water, making it extra handy for the water to boil the 2nd time around. there is earnings this someplace, i'm valuable of it.
2016-12-08 21:11:49 · answer #4 · answered by ? 4 · 0⤊ 0⤋
nooo.
hot water has a temperature near the boiling point so it would take less time to boil it compared to cold water
2007-04-07 16:32:04 · answer #5 · answered by conundrum 3 · 0⤊ 0⤋
There is a saying that "watched pot never boils", which makes sense, since there is considerable heat loss when you remove the lid of a pot.
2007-04-07 16:27:44 · answer #6 · answered by cattbarf 7 · 0⤊ 0⤋
nope that is not true
2007-04-07 16:28:14 · answer #7 · answered by jetshadow25 3 · 0⤊ 0⤋
that does not make sense.
2007-04-07 16:25:56 · answer #8 · answered by Anonymous · 0⤊ 0⤋