PHOTONS IN CHEMISTRY OUT. PHOTONS IN CHEMISTRY OUT WHY BOTHER?
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Transcript of PHOTONS IN CHEMISTRY OUT. PHOTONS IN CHEMISTRY OUT WHY BOTHER?
42.87 102
1
Tne
n Boltzman
T [oK] n2/n1
300 3 x 10-42
400 7 x 10-32
1000 3.4 x 10-13
2,000 6 x 10-7
5,000 3 x 10-3
6,400 1 %
10,000 5.7 %
20,000 24 %
50,000 56 %
42.87 102
1
Tne
n Boltzman
T [oK] n2/n1
300 3 x 10-42
400 7 x 10-32
1000 3.4 x 10-13
2,000 6 x 10-7
5,000 3 x 10-3
6,400 1 %
10,000 5.7 %
20,000 24 %
50,000 56 %
42.87 102
1
Tne
n Boltzman
T [oK] n2/n1
300 3 x 10-42
400 7 x 10-32
1000 3.4 x 10-13
2,000 6 x 10-7
5,000 3 x 10-3
6,400 1 %
10,000 5.7 %
20,000 24 %
50,000 56 %
42.87 102
1
Tne
n Boltzman
T [oK] n2/n1
300 3 x 10-42
400 7 x 10-32
1000 3.4 x 10-13
2,000 6 x 10-7
5,000 3 x 10-3
6,400 1 %
10,000 5.7 %
20,000 24 %
50,000 56 %
42.87 102
1
Tne
n Boltzman
T [oK] n2/n1
300 3 x 10-42
400 7 x 10-32
1000 3.4 x 10-13
2,000 6 x 10-7
5,000 3 x 10-3
6,400 1 %
10,000 5.7 %
20,000 24 %
50,000 56 %
Grotthuss-Draper law:
Only the light absorbed in a moleculecan produce photochemical Change in the molecule(1871 and 1841)
Stark - Einstein:
If a species absorbs radiation, then one particle is excited for each quantum of radiation absorbed
Stark - Einstein:
If a species absorbs radiation, then one particle is excited for each quantum of radiation absorbed
QUANTUM YIELD:
Φ = The number of molecules of reactant consumed for each quantum of radiation absorbed
Primary Φ ≤ 1Sum of all primary Φ’s =1