water

[theleeroy55]

once you have boiled something does it stop getting hot?

so if u boiled a load of water to 100 degrees but carried on heating it with a really hot flame would it stay at the same heat untill it all evapourates?

discuss

[brachiopod]

Yep.

(Assuming standard pressure, pure water etc. etc.)

But on the whole, your pot of water would boil round about 100�C, and the temperature of the water/container system would not rise above this until all the water evaporates (boils away).

[drjohn]

The keywords you need to do a search for are "Specific heat" and "latent heat of vapourisation".

Think in terms of energy. Bung energy in to raise temperature, then add more energy to go from liquid to steam.

[ianess]

Yep.......water boils and evaporates into a gas [steam] at 100*C, but steam itself can be superheated to unbelievable temperatures. Basically water above 100*C isn't water.

[stanleyman]

If water is heated under pressure the boiling point raises.

[ianess]

Good point, stanleyman.

[geo0939]

Consider the pressure cooker and why it cooks food quicker.

[pagey]

Myself and some friends were in the alps and my mate said that the boiling water was cooler than at home. Would 1800m altitude affect the temperature? How many degrees C?

[stanleyman]

The water will boil at a lower temperature at high altitudes and low pressures. Water boils at 100C at sea level so at 1800 mtrs it would be a warm cup of tea at around 93C.