nergy of atom in compound is___________________?
Correct answer: B. Lesser than individual
- A. EA. Higher than individual
- B. Lesser than individual
- C. No change
- D. Impossible to predict
Explanation
When atoms form a stable compound, energy is released and the bonded system has lower potential energy than the separate atoms. This lower energy makes the compound more stable than the individual uncombined atoms. The likely mistake is choosing a because forming bonds involves energy changes, but bond formation lowers rather than raises the system's energy.
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About Bond Energy
Bond energy is the energy needed to break one mole of a particular covalent bond in gaseous molecules, while bond formation releases energy. Reaction enthalpy is estimated by subtracting the total energy of bonds formed from bonds broken, with attention to average bond energies and their limitations for specific molecules.
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