Abstract Lab 8

Abstract Lab 8 - and faster rate of evaporation, this...

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
General Chemistry laboratory, Chem18 Experiment # 8 Date of Experiment: 11/15/2011 Date of Submission: 11/22/2011 Abstract: This lab was performed in four parts: the first part dealt with the comparison of vapor pressures between two organic liquids using computer software, the second part measured the rate of evaporation for each of the two liquids using computer software, the third part used gas chromatography to separate the organic compounds in an unknown liquid for the purpose of reading retention times to determine the compounds in the unknown, and the last part used chemical drawing software to draw the structure of the two organic liquids used in the first two parts. The two liquids in use were ethyl acetate and isopropyl alcohol. In the determination of vapor pressure, the ethyl acetate had a measured vapor pressure of 57.2 mmHg and the isopropyl alcohol had a measured vapor pressure of 32.2 mmHg. In the determination of rate of evaporation, the rate of temperature decrease for ethyl acetate is -0.113C/sec and -0.0440 C/sec. Since the ethyl acetate had a higher vapor pressure
Background image of page 1
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: and faster rate of evaporation, this indicates that the intermolecular forces between the bonds of ethyl acetate were not as strong as those of isopropyl alcohol. Based on the retention times given by the chromatogram of the TA, the substances could be identified because the retention times correspond to the boiling points, where the lower the boiling point, the lower the retention time. Therefore, the peaks on the chromatogram can be identified as methyl acetate, ethyl acetate, isopropyl acetate, and normal propyl acetate in that order. On the chromatogram of unknown liquid I, the three peaks would match up to methyl acetate, ethyl acetate, and normal propyl acetate based on their retention times. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Name Liz Zharovsky Bench C19 Lab day and section Tuesday - 2 TA Ramyaa Mathialagan Partner Siqi Liu Title: Gases: Evaporation, vapor pressure, and gas separation...
View Full Document

Ask a homework question - tutors are online