Exam-style question
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What does an increase in temperature during heating suggest about the internal energy of a substance?.
- A.The internal energy is decreasing.
- B.The internal energy is constant.
- C.The internal energy is increasing.
- D.The internal energy is at thermal equilibrium.
Model answer
What a good answer should say
- The internal energy is increasing.
Explanation
Why this works
The evidence of an increase in temperature during heating shows that the internal energy of the substance is rising. This implies that the heat energy supplied is being converted into internal energy, leading to an increase in temperature.
Thus, we conclude that the internal energy is increasing.
Common mistake
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