Which of these have a positive value of enthalpy?
Correct answer: C. Atomization
- A. Neutralization
- B. Combustion
- C. Atomization
- D. All of these
Explanation
Atomization is the process of breaking all the bonds in a substance to form individual gaseous atoms. Since bond breaking always requires an input of energy, the enthalpy of atomization is always positive (endothermic).
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About Enthalpy
Enthalpy is the heat content of a system measured at constant pressure, and its change indicates whether a reaction or physical process is endothermic or exothermic. The topic covers state functions, enthalpy diagrams, standard enthalpy of formation, combustion and neutralisation, and the relationship between ΔH and internal energy change.
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