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Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
What is the relationship between internal energy, heat, and work?
💡 Hint: Consider the terms in the first law of thermodynamics.
Question 2
Easy
Define exothermic and endothermic reactions.
💡 Hint: Remember how each affects the enthalpy change.
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 is the formula for calculating the change in internal energy?
- A) ∆U = q - w
- B) ∆U = q + w
- C) ∆U = w - q
- D) ∆U = q * w
💡 Hint: Recall the definition related to thermodynamic laws.
Question 2
In which type of reaction is ∆H negative?
- True
- False
💡 Hint: Think about the definitions of enthalpy change.
Solve and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
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.
Question 2
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.
Challenge and get performance evaluation