Question

why is electron gain enthalpy of chlorine is more negative than fluorine?​

Answer 1

Answer:

$\huge{\underline{\underline{\sf{Answer}}}}$

The negative electron gain enthalpy of fluorine is less than that of chlorine. It is due to small size of fluorine atom. As a result, there are strong interelectronic repulsions in the relatively small 2p orbitals of fluorine and thus, the incoming electron does not experience much attraction.

Answer 2

Answer :

★ Electron Gain Enthalpy :

• The energy released when an extra electron is added to a neutral gaseous atom is called electron gain enthalpy.
• In general, electron gain enthalpy becomes more negative (more exothermic) from left to right in a period and less negative from top to bottom in a group.

➤ Electron gain enthalpy of chlorine is more negative than fluorine because of there is more repulsion for the incoming electron when the size of atom is smaller$.$

• Order of size : F < Cl
• Order of repulsion : F > Cl
• Order of EGE : F < Cl

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