Question

Why bond dissociation enthalpy of fluorine is less than chlorine?

Answer 1

Bond energy of chlorine is greater than fluorine and enthalpy is the energy content of the system or molecules. So enthalpy of fluorine is less than chlorine. Answer: ... So, there is a large electron - electron repulsion in flourine which is less in case chlorine as in chlorine the last electron enters into 3rd shell.

Answer 2

Answer:

Flourine is smaller as compared to Chlorine. So, there is a large electron - electron repulsion in flourine which is less in case chlorine as in chlorine the last electron enters into 3rd shell. So, Bond enthalpy of flourine is more than chlorine