The ammonia molecule ( NH 3 )  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 1.9×10^6 N/C N/C . Part 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? Express your answer using two significant figures Part 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)? (Note: Above this temperature, thermal agitation prevents the dipoles from aligning with the electric field.)

Physics for Scientists and Engineers: Foundations and Connections
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Chapter26: Electric Potential
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Problem 67PQ: A charged particle is moved in a uniform electric field between two points, A and B, as depicted in...
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The ammonia molecule ( NH 3 )  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 1.9×10^6 N/C N/C .

Part 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? Express your answer using two significant figures

Part 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)? (Note: Above this temperature, thermal agitation prevents the dipoles from aligning with the electric field.)

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