Tin Melting Experiment - Lab Report Example

This gave the experimenter enough time to collect the data required (the change of temperature versus time). Every 5 seconds, the temperature was noted until the sample of melted Tin reached a temperature near 150C (10C above the freezing point of pure Tin) interevent the thermocouple sheath from freezing. After the data was collected, a plot of temperature versus time was developed. The plot took the form of a curve, which is the Tin-cooling curve. The curve shows the cooling process. 

Abstract:

This experiment was directed at determining the melting point of pure Tin. For this purpose, a ceramic crucible containing pure Tin was heated in a furnace up to the temperature that was expected above the melting point of pure Tin. Once that was achieved, the sample of liquid Tin was put into a container that was filled with sand. A thermocouple sheath was placed into the melted Tin and was isolated with the help of glass fiber. This retarded the cooling process of the sample of Tin and provided the experimenter with enough time to collect all of the required data (the change of temperature versus time). Finally, a plot of temperature versus time was developed that resulted in the formulation of the Tin-cooling curve which shows the cooling process. Once the results are compared with the actual data in the periodic table, a slight variation can be noticed that speaks of the verisimilitude of error somewhere in the experiment. 

Different elements have different freezing and melting points. This experiment uses the cooling curve to determine the melting point of pure Tin.

Experimental procedure:

1. Equipment
2. Furnace
3. Omega temperature meter
4. Glass fiber
5. Ceramic crucible
6. Thermocouple sheath
7. Plastic gloves.
8. Coffee container with sand.
9. Procedure:
10. A ceramic crucible containing pure Tin was placed in a furnace. The furnace heated the cubicle temperature of 400C.
11. Nitrogen was made to enter the furnace without oxygen so that the alloy did not oxidize.
12. After the melting of sample, the abasically judged, the sample was immediately shifted to the coffee container. The thermocouple sheath was added to the melted Tin sample.
13. With the help of plastic gloves, glass fiber was added to the sample to isolate it from the external air.
14. With an interval of 5 seconds, temperature was noted until the temperature dropped down to 150C.
15. Finally, the data collected was used to formulate a temperature versus time plot. This created the cooling curve for pure Tin.