Lab report Electronic state spectroscopy : Band spectrum of I2 University of California, San Diego - CHEM 105AChem 105A B2

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Lab report Electronic state spectroscopy : Band spectrum of I2 Zichao shao Partner: Zhenhuan Sun Professor：John E. Crowell 2017/10/20 Abstract The band spectrum of I2 ,a diatomic molecule i... n gas phase , was recorded and interpreted though Spectrophotometer UV-2450.The molecular energy levels and thermodynamic quantities can be analysis though the information the band energies provided.The list were all the experimental value.  -1.626x 117.654 (cm-1) 1  -1 4.12cm 2 ( )         N iN yi mxi b   -1 -1 115.654 1.420cm x 0.813 0.051cm     e e e   v 72 1 max   Thus E*=20077 1235cm-1 -1 -1 0 -1 -1 e -1 -1 0 12479.0cm 625.2 D 4592c 230.6 D 4476.0 220.8 D cm m cm cm cm          Theory 1. Energy levels of Iodine Visible spectrum : 620 to 500 nm between two electronic state of I2 A) Ground electronic state (X) absorb light at higher energies which has shorter wavelengths B) Excited electronic state (B) absorb light at lower energies which has longer wavelengths The total molecular energy formula is T TE G（v） F（J） (1) where: T = total molecular energy TE = electronic energy G(v) = vibrational energy (v is the vibrational quantum number) [Show More]

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