Chapter 5, Problem 11P

Under pressure, liquid helium can solidify as each atom bonds with four others, and each bond has an average energy of 1.74 × 10–23 J. Find the latent heat of fusion for helium in joules per gram. (The molar mass of He is 4.00 g/mol.)

For the preceding problem, find the equilibrium separation of the H and Cl atoms. Compare this with the actual value.

Check Your Understanding What does the energy separation between absorption lines in a rotational spectrum of a diatomic molecule tell you?