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Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
What is the definition of Standard Enthalpy of Formation?
💡 Hint: Think about what happens when elements combine.
Question 2
Easy
What does it mean when ΔH_c° is negative?
💡 Hint: Recall that combustion is a burning process.
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 Standard Enthalpy of Formation denoted as?
- ΔH_f°
- ΔH_c°
- ΔH_rxn°
💡 Hint: Think about what 'f' may stand for.
Question 2
True or False: The Standard Enthalpy of Combustion is always endothermic.
- True
- False
💡 Hint: Recall what happens in a combustion reaction.
Solve and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
Calculate the Standard Enthalpy of Reaction for the following balanced equation by using known standard enthalpies of formation: C₂H₄(g) + 3 O₂(g) → 2 CO₂(g) + 2 H₂O(l), given ΔH_f° [CO₂(g)] = –393.5 kJ/mol and ΔH_f° [H₂O(l)] = –285.8 kJ/mol.
💡 Hint: Use the summing formula for products and reactants appropriately.
Question 2
If the enthalpy of combustion of glucose (C₆H₁₂O₆) is –2803 kJ/mol, calculate the Standard Enthalpy of Formation for glucose knowing the formation of CO₂ and water.
💡 Hint: Connect the glucose combustion with its decomposition to relate to formation.
Challenge and get performance evaluation