dwurst_Experiment 4

dwurst_Experiment 4 - Experiment 4, Rotational-Vibrational...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
Experiment 4, Rotational-Vibrational Spectroscopy of CO 2 Author: Daniel Wurst Group 4 Section 4, T 11:00 AM – 2:00 PM 2/8/2011 Abstract: In this experiment, the principle objective was to use the FT-IR spectroscopy to determine experimentally the bond length of the Carbon Oxygen bond in a CO 2 molecule. This was done by measuring the infrared released by the bonds vibration and rotation. The data was then used in equations that were derived (as shown in the lab report) or by a least linear fit of the data that was used to solve for the main constants. One of these constants , the rotational constant, was found to be between 0.387 cm -1 and 0.438 cm -1 with the former being from equations and the later from least linear squares model. These values were then used to find the moment of inertia , ,and provided, once again, a range from 7.23 x 10 -46 kg m 2 to 1.33 x 10 -45 kg m 2 . From there the bond length was found to be 1.16653 x 10 -10 m for the equation method and 1.58375 x 10 -10 m for the least linear squares fit. These values when compared to the literary value of 1.16 x 10 -10 m were determined to be relatively close and therefore trusted as accurate values for this experiment’s error. Introduction: Wurst Page 1 2/8/11
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Experiment 4: Rotational-Vibrational Spectroscopy of CO 2 The purpose of this experiment was to use spectroscopy to determine key constants and intermolecular bond radii. This was done by analyzing the rotations and vibrations of a diatomic (and symmetric linear triatomic) molecule. In order to take both of these properties into consideration, each one needed to be able to be calculated differently using different equations. The vibration of such a molecule can be described best in terms of a quantum-mechanical harmonic oscillator. The quantized energy levels are given by the equation: (4-1) Where: = Planck’s constant
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 03/08/2011 for the course CHEM 232 taught by Professor James during the Spring '11 term at Clemson.

Page1 / 9

dwurst_Experiment 4 - Experiment 4, Rotational-Vibrational...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online