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daivinhtran
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why is average bond enthalpy of O2 is 495...But the formation enthalpy of O2 is 0 ??
Why are they different??
Why are they different??
Why is the Average Bond Enthalpy of O2 Different from its Formation Enthalpy?
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SUMMARY
The average bond enthalpy of O2 is 495 kJ/mol, while its formation enthalpy is defined as 0 kJ/mol. This discrepancy arises from the definitions of bond enthalpy and formation enthalpy. Bond enthalpy measures the energy required to break a bond in a molecule, while formation enthalpy refers to the energy change when one mole of a compound is formed from its elements in their standard states. Therefore, the two values represent different thermodynamic concepts and cannot be directly compared.
PREREQUISITES- Understanding of thermodynamic concepts such as bond enthalpy and formation enthalpy.
- Familiarity with chemical bonding and molecular structure.
- Knowledge of standard states of elements in thermodynamics.
- Basic principles of energy changes in chemical reactions.
- Research the definitions and calculations of bond enthalpy in various molecules.
- Study the concept of standard enthalpy of formation and its applications in thermodynamics.
- Explore the relationship between bond enthalpy and reaction mechanisms.
- Examine case studies of enthalpy changes in chemical reactions involving diatomic molecules.
Chemistry students, educators, and professionals in the field of thermodynamics and chemical engineering who seek to deepen their understanding of enthalpy concepts and their applications in chemical reactions.
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