I REMEMBER FROM A COLLEGE CHEMISTRY COURSE LEARNING THAT COLD WATER IN A POT WILL BOIL FASTER THAN HOT WATER?
Does my mental recall offer me correctly? Can we greatfully insist in item why? (I consider we recollect something about faster enlargement of H2O molecules). You do not have to give me the watered down answer (no joke intended), I’ll assimilate any vernacular we use. Thanks so much!!
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You probably remember a myth that someone told you and took it as fact. (I’ve done that plenty of times)
“A watched pot never boils” … not true! ….
but to answer your question…. thermodynamics tells you that matter at any given set of conditions of temperature and pressure contains the same amount of energy regardless of the path that it took to get there. So at ambient pressure (1 atmoshpere), water heated to a a given temperature contains the same amount of energy nomatter the temperature that it started at or how it was heated to get to that temperature. Now, between this temperature and boiling, the water will require the same energy (watts = amount of energy in a given time) to get to the boiling point.
To think that cold water would boil faster would be like expecting a ball dropped from a building to overtake a second ball and land sooner. Physcis won’t allow it.
Hope that helps!
I couldn’t imagine why, if it’s closer to the boiling point, then the molecules will get excited faster and thus move out of liquid solution before the colder one has time to heat up.
water expands when it is cooled, but expands more when it is heated to boiling.
so cool water might actually have larger spaces between the atoms than warm water would, subsequently colder water is closer to boiling than warm water (warm, not hot remember)
Hmm? Well, the speed at which a liquid boils is given by the amount and rate of kinetic energy applied. Is the hot water in the same kind of pot as the cold water? Unless, the pot is sealed with an equal vapor and atmospheric pressure, this should boil. Ok, when you have cold water you can give as much energy as you want for the water molecules to activate faster. This increases rate of boiling point. When you do this to hot water only a certain amount of energy left would be required to boil the
water. When both liquids are exposed to the same amount of heat and pressure, Cold water should not boil faster than hot water because hot water has a temperature closer to boiling than cold water. It all depends on the amount of energy you put in.