The ammonia molecule NH3 has a dipole moment of 5.0*10^-30 C*m. Ammonia molecule

Question

The ammonia molecule NH3 has a dipole moment of 5.0*10^-30 C*m. Ammonia molecules in the gas phase are placed in a uniform electric field E with magnitude 1.8*10^6 N/C. a. What is the change in electric potential energy when the dipole moment of a molecule changes its orientation with respect to E from parallel to perpendicular? b. At what absolute temperature T is the average translational kinetic energy (3/2)kT of a molecule equal to the change in potential energy calculated in part (a)? Need help solving with solution.

Explanation / Answer

change in electric potential energy = -5*10^-30*1.6*10^6 =-8*10^-24 J

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