Why does boiling water freeze quicker than cold water?

Answer 1

It doesn`t where did you hear such a silly thing

Answer 2

It is possible that boiling water freeze quicker(not all the time). It is depending on initial volume & temperature.
Remember, if the volumes are the same initially:
(1) The boiling water container has less mass to start with for freezing.
(2) The evaporation rate is faster from the boiling container, hence even less mass to freeze.
(3) If the initial volumes are large enough, it is possible that the water in the "boiling water container" may be cooled down to the same temperature of the water in the "cold water container" before the freezing point. At this "crossing" point, the initially boiling water will be frozen first due to less mass.

Hope I'll get 10 points for this.
Thanks & Cheers.

Answer 3

This is a fallacy. It is true that boiling water when placed in a colder environment loses its heat to that environment. It has a greater rate of cooling initially and the rate of cooling slows as the temperature of the water and its surroundings become more nearly equal. It is therefore true to say that boiling water cools faster, but certainl will not freeze faster. Of course we are talking about identical volumes of boiling and cold water. It could be possible to freeze a pint of boiling water long before a swimming pool of near freezing water had any ice on it.

Answer 4

Boiling water is too hot to freeze.when water is being heated to boiling point, you will notice,if you look into a sauce pan or kettle,that lots of bubbles come to the top quite a long time before the water boils.These pre boiling bubbles are gasses (oxygen and nitrogen) which are present in fresh water.Water wont normally freeze while these gasses are in solution. Fresh water cannot freeze until these solutes have been driven out in the cooling process.Incidentally,Fish can't live in water that has been boiled then cooled nor will iron rust. ONE LAST THING ,I DONT KNOW HOW OLD YOU ARE>DONT GO INVESTIGATING BOILING KETTLES AND SUCH WITHOUT PARENTS SAY-SO.

Answer 5

It doesn't. Boiling water is water at 100 C cold water is cooler. Water freezes at 0 C.

Clearly boiling water has to become cold water before it freezes.

Answer 6

I don't think thats true(never tried it), but if it is...
When you place the cold water and the hot water at below the freezing pt of water, the rate of loss of heat to surroundings (there's a law by Newton on that) will be greater for the hot water than for the cold water, causing the hot water to freeze faster.

I'd suggest you conduct the experiment to see if boiling water really freezes quicker than cold water though.

Answer 7

The rate of cooling for a particular object depends upon the environment in which it is placed. If an object initially having a temperature of 80degrees and other having a temperature of 30degrees are placed in an environment having temperature of 10degrees then the rate of cooling of first object is more as compared to the second one. Rate of cooling always depends upon the difference of temperatures of object and the environment in which it is placed. So the same reason holds for why a boiling water freezes faster than cold water.

Answer 8

Probably because according to Newton's law of cooling, the rate of loss of heat of a body is proportional to the difference in temperature between the body and the surroundings. Since boiling water has greater temp difference to the atmospheric temperature than cold water, it loses heat faster.

Answer 9

It's an old wives' tale! If you put 2 equal sized pots with the same amount of water in each, then put them in the freezer, the colder one (initially) will freeze first. The answer is gotten by simple logic. Suppose the water at 40 degrees takes 1 hour to freeze. Then the hot water will first have to cool to 40 degrees and then take 1 hour more to freeze.

Answer 10

Don't be ridiculous...Consider these facts.
1) Water freezes at 0C.
Take two litres of water, one at 30C and the other at 100C
(boiling).
They both start to cool in say a freezer compartment.
Their temperature drops, (granted the one at 100C will have a sharper temperature drop at the start than the one on 30C,)
Lets say it takes water 5 minutes to cool from 30C to 0C.
In that 5 minutes the boiling water will still be at around 50C.
It is never going to catch the other up.
When it reaches 30C it still has another 5 mins to go, the other is already at 0C(freezing).

Answer 11

A simple fact is that inertia causes things that are stationary to require greater energy to move than something that is already in motion.

The same applies to changing temperature. When water is cooling from a higher temp it gets going faster and passes through the transition into ice faster.