دراسة تاثير الآصرة C-I على الخواص الطيفية لجزيئة CH3I ودراسة الخواص الحرارية للجزيئة

This research studies the Spectroscopy and Thermodynamic Properties for Methyl iodide CH3I, Also the study include plot of molecule potential energy curve by changing the C-I bond length, from which the calculation ol the spectral dissociation energy .which was found to be (De=2.09493eV), an‎d study the vibration mode of CH3l and frequency were active in Raman and 1R spectra due to vaiiable in polarization and dipole moment ot molecule. Thermodynamic properties has been calculated at room temperature 298 K, for heat of Formation (AH t =9.445kcal/mol), Enthalpy (H=2481.5017cal/mol), Heat Capacity (CP=9.9266cal/K.mol), Entropy (S=66.7344cal/K.mol) and Gibbs Energy ( _17405.3495cal/mol). Values ot these functions have been calculated at thermal range (lOOoOOOK). Data relations for each property have been drawning with temperature and all results are near to experimental results.