1.4 - Types of Enthalpy Changes with Illustrative Examples
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Practice Questions
Test your understanding with targeted questions
What is the enthalpy of formation of water in kJ?
💡 Hint: Look for standard values from your resources.
Define enthalpy of combustion.
💡 Hint: Consider how combustion differs from other reactions.
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Interactive Quizzes
Quick quizzes to reinforce your learning
What does a negative ΔH_f° indicate?
💡 Hint: Think about the energy flow during formation.
Is the enthalpy of combustion always negative?
💡 Hint: Recall the nature of energy in combustion.
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Challenge Problems
Push your limits with advanced challenges
A compound has a ΔH_f° of -50 kJ/mol. If 4 moles of this compound are formed, what is the total heat change?
💡 Hint: Multiply the ΔH_f° value by the number of moles.
Given the reaction C3H8 + 5 O2 → 3 CO2 + 4 H2O; if ΔH_f° for propane is -104.7 kJ/mol, calculate ΔH_rxn° when 1 mole of propane combusts.
💡 Hint: Focus on determining products' total ΔH_f° and subtracting reactants' values.
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