1.1.1 - Internal Energy (E)
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Practice Questions
Test your understanding with targeted questions
Define internal energy.
💡 Hint: Think about the different types of energy involved in molecular motion.
What does the first law of thermodynamics state?
💡 Hint: Consider the implications of energy transformation in reactions.
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Interactive Quizzes
Quick quizzes to reinforce your learning
What is the correct formula for change in internal energy?
💡 Hint: Recall the precise wording of the first law.
True or False: In an endothermic reaction, internal energy increases.
💡 Hint: Think about how energy flows in endothermic reactions.
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Challenge Problems
Push your limits with advanced challenges
A system absorbs 120 J of heat and does 45 J of work on the surroundings. What is the change in internal energy?
💡 Hint: Be careful with the signs of heat and work!
Explain how an exothermic reaction can decrease internal energy while achieving a net release of energy.
💡 Hint: Consider the flow of energy and how it affects both the system and its surroundings.
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