Why Does Temperature Remain Constant When Water Boils?

AI Thread Summary
When water reaches its boiling point, the temperature remains constant despite continuous heat energy transfer. The graph of time versus temperature would show a linear increase to 100 degrees Celsius, followed by a horizontal line during the boiling phase. This horizontal line indicates that the temperature does not rise because the energy is used for the phase change from water to steam. The heat energy is absorbed to break molecular bonds rather than increase temperature. Thus, during boiling, the temperature remains stable while energy is utilized for vaporization.
physgirl
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So if heat energy is transferred at a constant rate until the water reaches its boiling point temperature (in 6 min let's say)... and then heat energy is transferrred at the same rate as the water boils for the next 4 min...

would the graph of time v. temperature look like: a straight line with constant slope going from original water temperature to 100 degrees in the first 6 minutes and then a straight horizontal line b/w 6 min and 10 min?

also, if that is correct, for the last 4 minutes, is the temperature constant despite the heat energy transfer because... the energy was being spent on changing water to steam rather than increasing the temperature?
 
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