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NEETChemistryThermodynamics (C)

What is bond dissociation enthalpy?

Options

  1. AThe enthalpy changes when two atoms combine to form a molecule.
  2. BThe enthalpy changes when one mole of covalent bonds in a gaseous covalent compound is broken to form products
  3. CThe enthalpy change when a solid substance sublimes at a constant temperature and under standard pressure.
  4. DThe enthalpy change when a substance is heated at constant volume.

Correct answer

B. The enthalpy changes when one mole of covalent bonds in a gaseous covalent compound is broken to form products

Step-by-step solution

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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