Why does water stop boiling when you lower the heat source (but is still more than the boiling temperature)?

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I have observed this while cooking, but if you boil something at high flame and then turn the flame low, the liquid stops boiling. E.g. Water boils at 100C. On high gas, it starts boiling. That means the water temp is now 100C. Then if I lower the flame, the water stops boiling even though the flame temperature is greater than 100C at all times. At high flame, the water has reached 100C, so if I lower the flame the water temp should still remain 100C.

In: Physics

10 Answers

Anonymous 0 Comments

The water can’t go beyond 100C (because then it turns to gas) all the water is not at 100C or else it would all instantly turn to gas.

Whenever a molecule turns to gas it takes that energy out of the pot. So the water will turn. Because it can’t go beyond 100 the moment the heat source stops the temp will reduce to 99.9999 or whatever and stop boiling.

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