Standard Science Primary 4 Energy

A pot of pure water is boiling on a stove. If the flame is turned up higher, what happens to the temperature of the boiling water?

A It fluctuates between 90°C and 110°C.
B It increases above 100°C.
C It stays at 100°C.
D It decreases slightly.
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Worked Solution

Step 1: The boiling point of pure water is 100°C at sea level. Step 2: During boiling, all added heat is used to change the state from liquid to gas. Step 3: The temperature will not rise until all water has turned to steam.

Correct answer: It stays at 100°C.

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