Grade 12Physical Chemistry

Which of the following will have the most negative electron gain enthalpy and which the least negative? P, S, Cl, F. Explain your answer ?

sudhanshu

12 Years agoGrade 12

3 Answers

Gaurav

11 Years ago

Hello Student
Halogens have highest negative value of electron gain enthalpy. Here Cl and F both are halogens but electron gain enthalpy of Cl is more negative than F because of very small size of F which causes interelectronic repulsion among its electrons.
Cl has the most negative one.
P has the lest negative one due to larger size.

Khushboo

7 Years ago

Electron gain enthalpy generally becomes more negative across a period as we move from left to right. Within a group electron gain enthalpy become less negative down a group. Adding an electron to the 2p orbital leads to greater repulsion than adding an electron to the larger 3p orbital. Hence cl is most negative & p is least negtive

Rishi Sharma

5 Years ago

Dear Student,
Please find below the solution to your problem.

Halogens have highest negative value of electron gain enthalpy. Here Cl and F both are halogens but electron gain enthalpy of Cl is more negative than F because of very small size of F which causes interelectronic repulsion among its electrons. Cl has the most negative one. P has the lest negative one due to larger size.

Thanks and Regards