The Potential Energy for the Formation of a Hydrogen Molecule

question 11

Multiple Choice

The potential energy for the formation of a hydrogen molecule can be approximated by U = -A + BR + C/R, where R is the nuclear separation. Given that A = -78.5 eV, B = 2.57 × 10¹¹ eV/m , and C = 1.44 × 10^-9 eV∙m. At what nuclear separation is the potential energy a minimum?

• A)1.9 × 10^-11 m
• B)3.7 × 10^-10 m
• C)7.5 × 10^-11 m
• D)2.9 × 10^-11 m
• E)5.1 × 10^-10 m