SUMMARY
The calculation of ΔH° for the chemical reaction is determined using the formula ΔH° = ∑ΔHBroken - ∑ΔHFormed. The correct calculation yields -108 kJ, confirming that the answer key is accurate. The confusion arises from the distinction between bond enthalpy and ΔH°, where a positive bond enthalpy indicates a negative ΔH°. This highlights the importance of understanding the relationship between bond enthalpies and reaction enthalpies in thermodynamics.
PREREQUISITES
- Understanding of thermodynamic principles, specifically enthalpy changes.
- Familiarity with bond enthalpy concepts and calculations.
- Knowledge of chemical reaction equations and stoichiometry.
- Ability to perform basic arithmetic operations with thermodynamic values.
NEXT STEPS
- Study the concept of bond enthalpy in detail, focusing on its implications in chemical reactions.
- Learn about Hess's Law and its application in calculating reaction enthalpies.
- Explore advanced thermodynamic concepts, including Gibbs free energy and its relation to ΔH°.
- Practice calculating ΔH° for various chemical reactions using different methods.
USEFUL FOR
Chemistry students, educators, and professionals seeking to deepen their understanding of thermodynamics and reaction enthalpies.