Thursday Blog

We talked about vaporization, which is a liquid turned into gas/vapor. We are doing a lab here shortly on vaporization of liquids. We plug a easy link, that has a temp. probe attached to it, into a calculator. Click on setup. Scroll down to time graph and hit enter. Click on edit. Put the time between samples at.5 seconds and hit next. Enter number of samples at 240 and click on next. Click on OK. Wrap the small piece of paper towel aroundd the end of the temp. probe and attaach it with small rubber bands. IMPORTANT: that all groups are using the same size piece of paper towel. Its dimensions needed to be 5cm X 5cm. Dip the endd of the temp. probe in the liquid( in beaker) at your lab table for 3 seconds. as soon as you remove the probe click on start and sit the kprobe so it is hanging over the ege of the table. You dont want a ddraft of air hitting the probe so do not move around during this. At the end of the 240 trials, (2 min.), the calculator will stop recording ata on the graph. You can trace your graph by sampling hitting the right arrow. it will tell you your data points (x and y). Record your data points in a table starting with time zero an record everoy 2 seconds what the temp. was. For this lab there werent enough calculators for everyone so there had to be groups of 3 to 5 people. IT was a little chaotic. This lab is very technical with some of its instructons and time settings. If you mess up, you basically have to start over.It was har d for alot of my classmates to figure out everything and to get it all set straight. They had to make SURE that they write down the temp. once it shows up. The temp. is key to this lab. When they think they are done with the lab, they will say so, but in reality there is more to the lab then just putting a temp. probe into liquid and finding one temperature. Its way more complex then what it looked like on paper. Once they figure out the numbers and whatnot they have to make a graph and then explain what happened to the liquid, temperature, and the timing. It was a long lab, and i couldd tell that some of my classmates who didnt pay attention to what they were supposed to be doing, were just sitting around, and letting someone else to do the work. I overlooked emilys paper to see what the data would look like once its been written down, and there was a lot. They also have to contrast and compare the numbers once they are all written down, AND make a line graph of the numbers, and give an explanation about why they did this, what was majorly important, what happened to the temperature andd why. For labs there is always more then just the lab that needs to be done. You can almost always predict that after the lab there is paper work of some kind, questions, and an explanation. Mrs. Sorensen told everyone to concentrate on getting the table of numbers done since we have a limited time, and the graph can be done later. And of course you need all the numbers in order to even make a graph. At the end of the lab they had to take off the paper towel from the probe, and wash the end of it off with distilled water. Mrs. Sorensen suggested that people should wash their hands when they are done as well. It was an interesting lab.