Question

the dipole moment of nh3g is 1.46 dis. if angle h-n-h is 180 degree calculate the bond moment of n.h bond​

Answer 1

Answer:

In NH

3

, N is more electronegative than H. So, N pulls the electrons from H towards itself and so the direction of the moment due to the N-H bonds is in the same direction as that of the lone pair of electrons on Nitrogen.

Whereas in NF

3

, the electronegativity of the F is more than N, thus the dipole moment of the bond pairs of electrons between N and F is towards F. But the dipole moment of the lone pair of electrons of N is opposite to the dipole moment of a bond pair.

So, NH

3

posses more dipole moment than that of the NF

3