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Question: Answered & Verified by Expert
What is bond dissociation enthalpy?
ChemistryThermodynamics (C)NEET
Options:
  • A The enthalpy changes when two atoms combine to form a molecule.
  • B The enthalpy changes when one mole of covalent bonds in a gaseous covalent compound is broken to form products in the gas phase.
  • C The enthalpy change when a solid substance sublimes at a constant temperature and under standard pressure.
  • D The enthalpy change when a substance is heated at constant volume.
Solution:
2987 Upvotes Verified Answer
The correct answer is: The enthalpy changes when one mole of covalent bonds in a gaseous covalent compound is broken to form products in the gas phase.
Bond dissociation enthalpy specifically refers to the energy required to break one mole of covalent bonds in a gaseous covalent compound to form products in the gas phase.

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