Question

bond dissociation enthalpy of halogens

Answer 1

Cl2 > Br2 > F2 > I2

Thats the order

Answer 2

Hi students,

◆ Halogens -

Elements from gr. 17 of modern periodic table are called halogens.

These include F, Cl, Br, I, At, Uus.

◆ Bond dissociation enthalpy of halogens -

• Energy to break a particular bond in a molecule is called bond dissociation energy.
• Bond dissociation enthalpies of halogens decreases going down the group.
• For F2, bond dissociation enthalpy is exceptionally lower that other halogens due its very small atomic size & high electronegativity.

Hope this helps.