6.3 - Internal Energy (U)
Enroll to start learning
You’ve not yet enrolled in this course. Please enroll for free to listen to audio lessons, classroom podcasts and take practice test.
Practice Questions
Test your understanding with targeted questions
What does internal energy (U) represent?
💡 Hint: Think about kinetic and potential energy.
Can changes in internal energy be measured directly?
💡 Hint: Consider how we gather information in experiments.
4 more questions available
Interactive Quizzes
Quick quizzes to reinforce your learning
What represents the total energy in a system?
💡 Hint: Focus on the definition of internal energy.
In an exothermic reaction, does the internal energy increase or decrease?
💡 Hint: Think about energy flow in reactions.
1 more question available
Challenge Problems
Push your limits with advanced challenges
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.
💡 Hint: Recall the formula and substitute Q and W values carefully.
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?
💡 Hint: Use the change in internal energy to find the work done.
Get performance evaluation
Reference links
Supplementary resources to enhance your learning experience.