Advanced Science Primary 4 Matter

The graph below shows the temperature of a substance being heated. Which part of the graph shows a change in state?

A Part where temperature increases
B Part where substance is a liquid
C Part where substance is a solid
D Part where temperature remains constant
Show Worked Solution

Worked Solution

Step 1: During a change of state (like melting or boiling), the temperature stays constant. Step [2-9]: The heat gain is used to overcome the forces between particles rather than raising temperature.

Correct answer: Part where temperature remains constant

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