Thu September 12, 2013 By: Mudita Agrawal

Given C= -122 N= +31 O= -141 Cl= -328 Arrange them in the decreasing order of their electron gain enthalpy

Expert Reply
Sun September 15, 2013
By gaining 1 electron, Cl completes its octet (that is, becomes very stable). So its elctron gain enthalpy is the highest followed by oxygen. However, N aton has a half-filled 2p orbital. When it gains one electron, it becomes less stable as indicated by its +enthalpy. Decreasing order is Cl, O, C, N
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