Answer to Question #271243 in Physics for Cheppie

Question #271243

Given that the potential energy of a pair of atoms in a solid is raised by 1 eV when their

separation is changed by 1Å, calculate the macroscopic elastic modulus of the lattice.

Expert's answer

By the equation for elastic potential energy:

"E=\\frac12kx^2\u2192k=\\frac{2E}{x^2}=32\\text{ N\/m}."

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