Question

Explain exchange energy

Answer 1

Hey.....✌


Here's ur ans. ⬇



↪ The stabilizing effect arises whenever two or more electrons with the same spin are present in the degenerate orbitals of a sub-shell .

These electrons tends to exchange their position and the energy released due to this exchange , is known as exchange .



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Answer 2

HERE IS YOUR ANSWER ✅

Exchange energy is the energy released when two are more electrons with the same spin exchange their position in the degenerate orbitals of a subshell. Let's assume an atom in which there are five unpaired electrons in its n d - orbital.
Now the exchange energy increases with the number of electrons with same spin

Exchange energy E = K. n. (n-1)/2

n= no. of electrons with same spin.

K= exchange constant (different for different metals)

Now, as in the half filled configuration, the number of electrons with same spin i.e. n is maximum for the degenerate orbitals of a particular subshell, thus, the exchange energy is maximum for this configuration & thus stabilizes the most.

e.g. Cr (24) takes d5 configuration instead of d4 to gain the more stabilization due to exchange energy.

HOPE IT HELPS YOU