Question:
I am having a very big doubt that what is the correct answer of the noble gas electron gain enthalpy ..... I've asked this question before in ExamFear (you can found it here :- http://www.examfear.com/question/4219/detail.htm) Someone answered it as 0, but while viewing the lectures uploaded by ExamFear itself there the teacher told the Electron Gain Enthalpy of noble gases are some positive values, See it :- https://www.youtube.com/watch?v=hjogy8oMM0g (here at 7:36) .... Please answer this as soon as possible as I am getting various kinda answers for this particular question (Even on Google), it is causing a huge doubt !!!!!!!!!!!
Answer:
If you understand the meaning of electron gain enthalpy, then you yourself can understand and judge what it should be for noble gases.
As answered in the previous question that you had asked a day before, electron gain enthalpy is the energy required for an atom in its charged state to either gain electrons so as to achieve a stable octet configuration.
As you know, for noble gases there is no need for such a gain or loss of electron to achieve octet because they have a stable octet cnfiguration in the native form of atom itself. Thus, there is no exchange of electrons involved and hence, noble gases have a zero electron gain enthalpy.
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