Question

Here is what my lab was about:

Properties of alcohols:
First, I wrapped the bulb of a thermometer with a tissue secured with a wire. Then I squeeze enough methanol onto the tissue to completely saturate. At the same time, another person starts the stopwatch, reads the temperature and, and records it. Then I fanned the tissue-covered thermometer bulb with a piece of cardboard or other stiff paper. After one minute, read and record the final temperature. And we repeat doing these steps for the other alcohols.

Question:
what can you conclude about the relashionship between heat transfer and the differences in the temperature changes you observed ?

formulate a statement that summarizes your data, relating temperature change to the substance tested

Answer 1

I won't write you lab report for you but what you'v described is this.

When you fan the alcohol you help it evaporate, that cools the bulb of the thermometer and you read a lower T. When the bulb is covered with cardboard the alcohol can't evaporate as easily and the T doesn't drop as far or as fast.