Question

decreasing order of electron gain enthalpy enthalpy
o,s,cl,f

Answer 1

Explanation:

The decreasing order of electron gain enthalpy enthalpy is as given below:

O < S < F < Cl

Electron affinity can be defined as the energy related to addition of electron in neutral gaseous atom. Across the period, from left to right, it becomes more negative due to decrease in the atomic size.

Here, chlorine has more "negative electron gain enthalpy" than fluorine due to presence of 3rd shell in chlorine which is absent in fluorine.  Sulphur has more "negative electron gain enthalpy" than oxygen.

Answer 2

Answer:

Chlorine gives highest electron gain enthalpy rather than flourine

Cl > F > O > S