From the Bohr model, the radius of a hydrogen atom in the ground state is 0.53 × 10-10 m and the radius of the first excited state is four times larger. The energy of the ground state is -13.6 eV, and that of the first excited state is -3.4 eV.
(a) What are the values of ?E and p?V for excitation into the first excited state at atmospheric pressure?
(b) At what pressure would the p?V term be comparable to ?E? How many atmospheres is this?