5.8 - Exercises
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 is the relationship between internal energy, heat, and work?
💡 Hint: Consider the terms in the first law of thermodynamics.
Define exothermic and endothermic reactions.
💡 Hint: Remember how each affects the enthalpy change.
4 more questions available
Interactive Quizzes
Quick quizzes to reinforce your learning
What is the formula for calculating the change in internal energy?
💡 Hint: Recall the definition related to thermodynamic laws.
In which type of reaction is ∆H negative?
💡 Hint: Think about the definitions of enthalpy change.
Get performance evaluation
Challenge Problems
Push your limits with advanced challenges
A gas expands in a piston from 10 to 20 liters at a constant pressure of 2 atm, while absorbing 5 kJ of heat. Calculate the change in internal energy.
💡 Hint: Remember to convert units when calculating work.
During a reaction, 1.0 mol of gas undergoes a change in enthalpy of +40 kJ at constant pressure. If 15 kJ of heat is released, calculate the change in internal energy.
💡 Hint: Be sure to pay attention to the positive and negative signs while calculating.
Get performance evaluation
Reference links
Supplementary resources to enhance your learning experience.