Q. Which of the following represents the correct order of increasing electron gain enthalpy with negative sign for the elements O, S, F and Cl?
A) S < O < Cl < F
B) Cl < F < O < S
C) O < S < F < Cl
D) F < S < O < Cl
Explanation
[Solution from source] Negative electron gain enthalpies: O ≈ 141, S ≈ 200, F ≈ 328, Cl ≈ 349 kJ/mol. O and F are less negative than S and Cl because their small size causes electron repulsion. So O < S < F < Cl. Answer (3).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.