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

Question

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

Answer 1

While the flame is over 100 degrees, the air surrounding the pot is much lower and constantly trying to cool the water. The heat you’re adding with the fire has to be more than the cooling effect of room temperature air, otherwise the water temperature will decrease.