Exam-style question
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What is the first law of thermodynamics?.
Model answer
What a good answer should say
- The first law of thermodynamics states that energy cannot be created or destroyed, only transformed from one form to another.
- In a closed system, the change in internal energy is equal to the heat added to the system minus the work done by the system.
Explanation
Why this works
This answer is strong as it accurately defines the first law of thermodynamics and explains the relationship between internal energy, heat, and work. The question tests the student's understanding of fundamental thermodynamic principles.
Common mistake
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