A molecule of a substance has a permanent electric dipole moment of magnitude 10-31 Cm. A mole of this substance is 100% polarised by applying a strong electrostatic field of magnitude 108 Vm1. The direction of field is suddenly changed by all angle of 60°. Find the heat released by substance in aligning its dipoles along the new direction of the field.
[Take 1 mole = 6 × 1023 molecules]
1
-9J
2
-3J
3
9J
4
3J