Question detail
Explain how the energy store of water changes when it is heated to boiling in an electric kettle.
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
Question
Type
exam_style
Style
Topic
Energy changes in a system, and the ways energy is stored before and after such changes
Question
Explain how the energy store of water changes when it is heated to boiling in an electric kettle.
Answer
As the electric kettle heats the water, electrical energy is transferred to the water, increasing its thermal energy store. This energy input raises the water's temperature until it reaches boiling point, at which point the thermal energy store is at its maximum for that pressure.
Explanation
This question assesses the ability to explain energy changes in a system. The answer effectively links the process of heating with the increase in thermal energy, demonstrating a clear understanding of energy transfers.
Common mistake
Misunderstanding Energy Transfer
Students often think that the energy from the kettle is only stored as thermal energy in the water and forget that energy is also transferred to the kettle itself.
Remember that energy is transferred to both the water and the kettle, and describe how the energy-store changes in both components.
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