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
To create bubbles at the bottom of the pot requires a lot of energy. When a gas bubble forms it has to displace the liquid around it and is under pressure from the water above it. So with the high flame adding a ton of energy there’s enough energy to create a high enough pressure bubble to rise to the surface (boiling). When you reduce the flame, the temperature may stay 100c but there’s not enough energy to create bubbles to boil. It’s why if you watch water start to boil you can see the bubbles form and collapse.
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