Electron gain enthalpy with negative sign of fluorine is less than
Electron gain enthalpy with negative sign of fluorine is less than that of chlorine due to :
(a) High ionization enthalpy of fluorine
(b) Smaller size of chlorine atom
(c) Smaller size of fluorine atom
(d) Bigger size of 2p orbital of fluorine
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(c) The electron gain enthalpy order for halogens is Cl > F > Br > I Due to small size of fluorine the extra electron to be added feels more electron-electron repulsion. Therefore fluorine has less value for electron affinity than chlorine.
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