Boiling Water

just for fun... In regards to room temperature water from the tap or room temperature water that has been previously boiled. Does one come to a boil faster than the other or the same time?

 

Such can't be ascertain without doing it in controlled environment & process. The most prominent contributing factor would be heat transfer.

 

It will depend on the heat capacity (the amount of heat energy needed to raise the temperature of a substance 1 degree Celsius) of the 2 waters. The water with the higher mass will boil first if all other variables are constant. If your tap water has salts/solids in it. When you boiled it the first time, it would be more concentrated the second boil and will therefore boil faster.

Dale