What is the change in the electric potential energy (in electron volts) of a singly charged positive ion, located at a point 10 nm from a water molecule, when the dipole of the water molecule rotates from pointing toward the ion to pointing at right angles to it?

Question

Quizplus · Accepted Answer

The electric potential energy change is due to the interaction between the dipole of the water molecule and the electric field of the ion. When the dipole rotates from pointing toward the ion to pointing at right angles, the potential energy decreases, indicating a negative change. The magnitude of this change is calculated using the dipole potential energy formula, which involves the dipole moment of water and the distance from the ion. The correct magnitude and sign are given in option A.

What Is the Change in the Electric Potential Energy (In