Respuesta :
The standard enthalpy of formation is the energy transformation that transpires due to the production of a mole of a substance from constituent components.
The correct answer is:
- Option A. H₂O (l)
- Option B. C (s, diamond)
- Option D. Br₂ (l)
This can be explained as:
- The refined component in its innately arising state has zero standard enthalpy of formation.
- Water exists as a liquid in its crude form and hence has 0 enthalpy.
- Carbon in its allotropic form as diamond is also a naturally occurring form and will have zero enthalpy.
- Ozone is formed by the interaction of oxygen and free oxygen and hence, will not have zero enthalpy.
Therefore, carbon, bromine and water will have zero enthalpy.
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