Homework Help: Chemistry Lab

Posted by Shawn Tabrizi on Monday, January 17, 2011 at 6:30pm.

Determine the ionization energy of a hydrogen atom (in kJ/mol) if the electron is in its ground state. (Hints: Use the Rydberg equation, remember E=hc for a single H atom, and R=109678x10–2nm–1 )

_____ kJ/mol

Thanks :)

Chemistry Lab - DrBob222, Tuesday, January 18, 2011 at 12:19am
1/wavelength = R(1/n1^2 - 1/n2^2)
n1 = 1
n2 = infinity which makes 1/n2^2 = 0 so you have
1/wavelength = R(1)
Calculate wavelength.
Then E = hc/wavelength.
Solve for E in J. That will be for 1 atom. Multiply by 6.022E23 to convert to J/mol and convert that to kJ/mol.
Chemistry Lab - anon, Sunday, January 23, 2011 at 4:28pm
1.312E03

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