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Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
What does ∆H represent in a chemical reaction?
💡 Hint: Think of how energy changes during a reaction.
Question 2
Easy
Is a reaction with a negative ∆H exothermic or endothermic?
💡 Hint: Remember how heat moves in exothermic reactions.
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 relationship between enthalpy and heat transfer during a chemical reaction?
- Entalphy is unrelated
- Enthalpy measures heat transfer
- Both are equivalent
- None of above
💡 Hint: Think about how we calculate heat changes.
Question 2
True or False: A positive ∆H indicates an exothermic reaction.
- True
- False
💡 Hint: Recall the signs associated with heat flow.
Solve and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
Calculate the enthalpy change if 2 moles of H2O (l) are converted to H2O (g) at 100°C, given ∆Hvap = 40.79 kJ/mol.
💡 Hint: Remember the phase transition formulas for vaporization.
Question 2
You have a reaction that involves multiple steps: A + B → C (∆H = -50 kJ), C + D → E (∆H = +20 kJ). What is the overall enthalpy change for the reaction A + B + D → E?
💡 Hint: Apply Hess's Law for summing the reactions.
Challenge and get performance evaluation