Procedure:
1. We wrapped probe 1 and probe 2 with filter paper and attached them with rubber bands.
2. For the first round we put probe 1 in the methanol and probe 2 in the ethanol for over 15 seconds so the liquid could soak through the filter paper.
3. We then took the probes out of the containers and attached them to the end of the table with masking tape, making sure they didn't touch.
4. We allowed the liquids to sit on the edge of the table, while monitoring the temperature. We took apart the probes after the temperature became consistent.
5. We took the higher temperature and subtracted the lowest temperature to get the change in temp.
6. We then predicted the change in temperature for the next few chemicals and repeated the steps for heptane and hexane, and propanol and butanol.
Materials:
Mac computer rubber bands masking tape
ULI methanol
Data Logger ethanol
Temperature probes propanol
filter paper hexane
Here are our results:
Heptane and Hexane Lab
As shown in the graph above, during the heptane and hexane section of this lab, it was determined that although at the beginning the temperatures were very similar, as the time progressed, it was obvious that the heptane had a much higher temperature than the hexane did. This was a difference of almost 10 degrees celsius at 174 seconds.
Methanol and Ethanol
In the methanol and ethanol section of this lab, the results looked a lot lke the heptane and hexane lab with few differences. The temperatures started out very similar to each other but as the chemicals evaporated, it was obvious that the ethanol had a much higher temperature than the methanol. This difference was almost 7 degrees celsius.
Propanol and Butanol
The propanol and butanol section was the most diverse of the rest of the lab. There might have been a mistake in the lab procedure as the temperature of the propanol spiked and then immediately decreased. But, as time went on, the temperatures steadied and it was obvious that the butanol had a slightly higher temperature than the propanol. This difference was meerly 5 degrees at 254 seconds.
