Respuesta :
it is because say water boils at 212 F, if it goes higher at 213 it would get so much heat and energy it turns into a gas, so it cannot stay a liquid with 213 because at that point it would be gas, thus when water reaches 212 it's max if it goes any higher it will be gas
When boling occurs the more energetic molecules change to a gas spread out and form bubbles. ... in addition gas molecules leaving the liquid take away heat energy. Therefore the temperature of the liquid remains constant durning boling .