what is difference between electron gain enthalpy & electron affinity

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Answer

The electron gain enthalpy is the enthalapy change,when a gas phase atom in its ground state gains an electron. electron affinity is the negative of the energy change accompanying electron gain.

Answer

If energy is released when an electron is added to an atom EA is positive whereas EGE is negative

Answer

Electron Gain Enthalpy vs Electron Affinity
The electron gain enthalpy and electron affinity are both related to the energy released or absorbed when an electron is added to an atom. While they are closely related concepts, there are some key differences between the two.

Electron Gain Enthalpy
- Electron gain enthalpy is the amount of energy released or absorbed when an electron is added to a neutral gaseous atom to form a negative ion.
- It is a thermodynamic quantity and is expressed in terms of enthalpy change.
- Electron gain enthalpy is usually represented with a negative sign for energy released and a positive sign for energy absorbed.
- It is influenced by factors such as atomic size, nuclear charge, and electron-electron repulsions.

Electron Affinity
- Electron affinity is the energy change when an electron is added to a neutral atom in the gas phase to form a negative ion.
- It is a measure of an atom's ability to attract and hold an additional electron.
- Electron affinity can be both exothermic (energy released) or endothermic (energy absorbed).
- Unlike electron gain enthalpy, electron affinity is a more general term and does not specifically consider enthalpy changes.

Main Differences
- The key difference between electron gain enthalpy and electron affinity lies in their expressions and definitions. Electron gain enthalpy specifically refers to the enthalpy change, while electron affinity is a broader term that encompasses the energy change when adding an electron.
- Electron gain enthalpy is expressed in terms of enthalpy change with specific signs, while electron affinity can be expressed as either exothermic or endothermic.
- Electron gain enthalpy is a more specific term that considers the enthalpy changes in the process, whereas electron affinity is a more general concept that focuses on the energy change during electron addition.

Answer

You can think that Electron Affinity is just the same thing as Electron Gain Enthalpy but with only difference in the sign of energy

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