Exp 5 Soo Jin Park 73426
Name: Soo Jin Park
Date: 02/20/15
Exp 5: Liquids and Solids
Lab Section: 73427
Data Table:
Boiling Point Trial 1 Trial 2 Trial 3
Temperature when the last bubble has emerged __86.5˚C _89.4_˚C 87.6_˚C
Average temperature from all three trials 87.8˚C
% error __6.55_%
Melting Point Trial 1 Trial 2 Trial 3
Temperature when the acetamide melts _85.7_˚C 89.5__˚C 87.4_˚C
Average temperature from all three trials __87.5˚C
% error __8.07__%
Conclusion:
The purpose of this experiment is to determine the boiling point of a liquid and the melting point of a solid. It is useful to know the melting point and boiling point of a substance to identify whether it is pure or not. I could learn how to determine the melting and boiling point of a substance through its temperature when the acetamide turned into a liquid and bubbles emerged from the capillary tube in the Isopropyl alcohol.
Coincidently, the temperature of the melting point of the acetamide and the temperature of the boiling point of the Isopropyl alcohol was similar, even though melting point and boiling point were totally different physical properties each other. When I kept water boiling up to 105˚C with the acetamide, it maintained a liquid state, not turning into gas. Through this, I also could deduce the boiling point of acetamide might be much higher than the Isopropyl alcohol, and water.
In this experiment, handling experiment tools such as capillary tubes and small amount of chemicals was a great challenge for me. There were several errors to observe bubbles from the capillary tube, which could be affected the experiment result. Observing bubbles from the capillary tube was also complicated. At first, I could not observe any change of the capillary tube in the Isopropyl alcohol, though the water was boiling over 102˚C, because emerging bubbles were almost invisible to my sight. So I should concentrate to observe it very carefully.
Date: 02/20/15
Exp 5: Liquids and Solids
Lab Section: 73427
Data Table:
Boiling Point Trial 1 Trial 2 Trial 3
Temperature when the last bubble has emerged __86.5˚C _89.4_˚C 87.6_˚C
Average temperature from all three trials 87.8˚C
% error __6.55_%
Melting Point Trial 1 Trial 2 Trial 3
Temperature when the acetamide melts _85.7_˚C 89.5__˚C 87.4_˚C
Average temperature from all three trials __87.5˚C
% error __8.07__%
Conclusion:
The purpose of this experiment is to determine the boiling point of a liquid and the melting point of a solid. It is useful to know the melting point and boiling point of a substance to identify whether it is pure or not. I could learn how to determine the melting and boiling point of a substance through its temperature when the acetamide turned into a liquid and bubbles emerged from the capillary tube in the Isopropyl alcohol.
Coincidently, the temperature of the melting point of the acetamide and the temperature of the boiling point of the Isopropyl alcohol was similar, even though melting point and boiling point were totally different physical properties each other. When I kept water boiling up to 105˚C with the acetamide, it maintained a liquid state, not turning into gas. Through this, I also could deduce the boiling point of acetamide might be much higher than the Isopropyl alcohol, and water.
In this experiment, handling experiment tools such as capillary tubes and small amount of chemicals was a great challenge for me. There were several errors to observe bubbles from the capillary tube, which could be affected the experiment result. Observing bubbles from the capillary tube was also complicated. At first, I could not observe any change of the capillary tube in the Isopropyl alcohol, though the water was boiling over 102˚C, because emerging bubbles were almost invisible to my sight. So I should concentrate to observe it very carefully.