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Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
What does internal energy (U) represent?
π‘ Hint: Think about kinetic and potential energy.
Question 2
Easy
Can changes in internal energy be measured directly?
π‘ Hint: Consider how we gather information in experiments.
Practice 4 more questions and get performance evaluation
Interactive Quizzes
Engage in quick quizzes to reinforce what you've learned and check your comprehension.
Question 1
What represents the total energy in a system?
- Internal energy (U)
- Enthalpy (H)
- Work (W)
π‘ Hint: Focus on the definition of internal energy.
Question 2
In an exothermic reaction, does the internal energy increase or decrease?
- True
- False
π‘ Hint: Think about energy flow in reactions.
Solve 1 more question and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
A closed container of gas absorbs 250 J of heat and does 50 J of work on its surroundings. Calculate the change in internal energy.
π‘ Hint: Recall the formula and substitute Q and W values carefully.
Question 2
If a reaction occurs in an isolated system where the initial internal energy is 500 J and the final internal energy is 450 J, how much work was done by the system if no heat was exchanged?
π‘ Hint: Use the change in internal energy to find the work done.
Challenge and get performance evaluation