Cl + e ----> Cl- ΔH = -348kJ/mol The value -348KJ/mol in this case will be:
Correct answer: C. Electron affinity
- A. Ionization energy
- B. Electronegativity
- C. Electron affinity
- D. Entropy
- E. Free energy
Explanation
As it can be seen in the equation, electrons are gained by the element chlorine to form a negative ion (anion). The process in which electrons are gained is called electron affinity.
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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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