Pre-Lab
Data
1. Shown in data table
2. From my data, Methanol had the greatest difference in temperature and glycerin had the least difference in temperature. Methanol is a small molecule which has weak hydrogen bonding. Hence, it evaporated very fast. Ethanol is the same as methanol but it is larger, which means that there will be more London forces. Water is also a small molecule, but it has strong hydrogen bonds. n-Butanol is a larger molecule which means that it will have more London forces. Glycerin is also a large molecule which means that it has greater London forces. Glycerin has three -OH groups which gives increased hydrogen bonding. Therefore, glycerin has more interactions which would make it least volatile when compared to the other substances.
3. Methanol, ethanol, and n-Butanol are similar in the way that they are alcohols. As molar mass increases, London forces increase. Therefore, the n-Butanol has more London forces than methanol and ethanol since it has a greater molar mass.
4. All of the compounds had a single -OH group with the exception of glycerin. Glycerin had three -OH groups which allowed more interactions to happen which made it less volatile.
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