While boiling water, I was thinking: Would one liter of water boil faster or slower if I boil it all at the same time, or if I do it in stages, ie: First boil one deciliter, then add a deciliter and wait it to boil, and so on until there's one liter of boiling water. Stated a bit more formally: Suppose you have 1 liter of water at a certain temperature (just for the sake of example let's say 10 degrees celsius) and you have a hot plate and a pot, and you want to raise the temperature of the water to 100 degrees celsius. Two different methods are tested: 1) Just put the 1 liter of water in the pot, and wait for it to reach 100 degrees. 2) Add 1 dl of water to the pot, wait for it to reach 100 degrees, and repeat this 9 more times. Which of those methods would be faster, or does it make any difference?