Chem 303
Quantum Chemistry and Spectroscopy
1
Niels Bohr
Niels Bohr and Albert Einstein debating quantum theory at
Paul Ehrenfests home in Leiden (December 1925).
Niels Henrik David Bohr (Danish pronunciation: ( 7
October 1885 18 November 1962) was a Dani
Chem 303
Quantum Chemistry and Spectroscopy
1
Model #2: Rotational Motion
J: Angular Momentum
Moment of Inertia:
I = mr2
(1) Classical Energy:
E = J2/2I into S.E.
(2) Solve using math and
boundary conditions:
EJ = hcBJ(J+1)
Rotational q.n. (J) 0, 1, 2,
B
Chem 303
Quantum Chemistry and Spectroscopy
Gustav Kirchhof (left) and
Robert Bunsen (right)
1
Introductory Concepts for Quantum Chemistry
and Spectroscopy
(1) Classical mechanics we learn about in physics
(2) The electromagnetic spectrum
(3) Energy unit
Chem 303
Chemical Kinetics
1
Reaction Mechanisms
The form of the rate equation does not tell us the actual mechanism but it may
still give some useful clues. As an example, consider the reaction:
AP
One can hypothesize that there is some intermediate I fo
Chem 303
The Gibbs Phase Rule, the GibbsDuhem Equation,
Solubility, and Experimental Methods
1
The Gibbs Phase Rule
Gibbs' phase rule, was proposed by Josiah Willard Gibbs in the 1870s as the
Equality:
F=CP+2
J. Willard Gibbs
where P ( alternatively or )