Mass, Frequency, Bond Strength Lab

The purpose of this experiment was to investigate the relationship between mass, frequency, bond strength. Using the Infrared Spectroscopy,computer simulations, and spring stiffness provided with evidence that validated the experiment.
The first set of test focused on how the mass of certain molecules affect vibrational frequency. Table A1. shows two different masses with two different frequency. A spring stiffness of 85 g/cm was used with a mass of 430.31g showing a frequency of 60(s/1) . Using the same spring stiffness the same trial was done a second time but this time increasing the mass to 1475.65g. When the mass increased the frequency decreased to 34s/1. The third time a different spring was used with a stiffness of 35 with the same
When the mass was increased from 430.31 to 1475.65 with a 85 spring stiffness the frequency decrease. That further explains how weight is inversely proportional to frequency. On the other hand, when spring stiffness decreased the vibrational increases showing that frequency and vibration are directly proportional. Table A2 shows the vibration of molecules with atoms of different masses. The first molecule was water with a total mass of 18.015g/mol. Water gave a frequency of 1885.0816cm/1 and a bend, 3502.3914cm/1 asymmetric stretch, and 3581.3997cm/1 symmetric stretch vibration. Deuterated chloroform has a total mass of 20.02 g/mol with a frequency of 1379.1670 cm/1 with a bend, 2565.7061cm/1 asymmetric stretch , and 2582.6595 symmetric stretch vibration. Table A2 further validates the relationship between mass and frequency. Deuterated chloroform has a higher mass than water since deuterium is heavier than hydrogen. Since that is the case it makes sense that hydrogen had a
In the spectrum of deuterated chloroform and chloroform there is a peak at 3019.89cm/1 that was not present in the spectrum of deuterated chloroform. The peak is due to the addition of the Hydrogen. There is a big difference in electronegativity between the bond C-H which caused the peak to be intense and present. In the spectrum for carbon tetrachloride there was only one intense peak for the bond of C-Cl at a frequency of approximately 780 cm/1. The peak was intense due to is polarity but the frequency was very low compared to other molecules. Although the C-Cl bond has a strong peak the frequency is low because of its mass. The mass for only chloride alone is approximately 35 amu which causes the frequency to be low. This further validates how mass and frequency are inversely proportional. Bond order is also related to frequency. The stronger the bond the higher the frequency. This was shown through the bond of hexane, hexene and hexane. Hexane only has single bonds between C-C and the frequency came out to be the lowest for all three molecules. As the bond strength increase to C=C the frequency also increase to to 1641 cm/1. The triple bond of C and C was even higher with a frequency of 2100 cm/1. This shows that bond strength and