For the reaction: 1/2 H2 → H , the change in enthalpy is called _.
Correct answer: C. Enthalpy of Atomization
- A. Enthalpy of Formation
- B. Enthalpy of Neutralization
- C. Enthalpy of Atomization
- D. Enthalpy of Reaction
Explanation
The given reaction ½ H2 → H represents the dissociation of hydrogen molecule into hydrogen atoms, and the enthalpy change associated with this process is called the enthalpy of atomization.Enthalpy of atomization is defined as the enthalpy change required to break one mole of a compound or element into its constituent atoms in the gas phase.
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About Thermochemistry and Energetics of Chemical Reactions
Thermochemistry measures energy changes in chemical reactions and distinguishes exothermic from endothermic processes. Work covers systems, surroundings and state functions, internal energy, the first law of thermodynamics, enthalpy and Hess's law, including the sign conventions used when heat enters or leaves a system.
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