Watch the Ice MELT and then BOIL

Today in Mr. Liberman's class he started of by giving us five labs back that went on our semester 1 grade Next he handed out a calender of our continuation of Unit 7. Next he told us that there is a couple of Web Assign up for us to do. Also, he told us that the

question set for the second set of Unit 7 may not be done by paper, but by a Web Assign and he told us he'd give us his answer tomorrow. Then we switched seats and have new lab partners. Eventually we learned about our new lab format. Where we are given a sheet with less post-lab questions YES! and no pre-lab. It is a more organized format that helps us come to the conclusion of our labs better this lab was called Heating Curve Lab. The first part of the lab was to write the lab goal which in this case is to use a heating curve to determine the temperature at which a sample of ice melts and boils.

The procedure of this lab is as follows: First we obtained 150 mL beaker of crush iced which we took the initial temperature of, for my group it was -.02 degrees celsius. After we began heating it until it melted which was .1 degrees celsius because this is when the ice started to turn into water. Next we began checking the temperature of the water every minute until it began to boil which was 90.0 degrees celsius and after we raised the hot plate to the highest temperature for 3 more recoreded temperatures. Next we had to make a graph of our data so i made my like the photo above. You use your time as the x coordinate and temperature as the y. Next you had to do the percent error for your boiling temp vs. the actual which is 1oo degrees celsius. To do this you do 90.o + 273 (kelvin) -100.o + 273/ 373 which is -2.7 % error which is not but that is what my data states. This is correct because you do actual -theorectical/ theorectical. So my actual was 90 degrees because that is when ours began to boil. Then you do the same thing for melting so my group was .1 degrees celsius so you do .1 + 273 - 0 -273/ 373= .037 % error. You use 0 because that is the melting point of water. So to answer the first post lab question you give your own boiling and melting point of water. To answer the second you explain how you got it and, finally for the third you explain what you may have done wrong like in my case where I got -2.7 % error. Well that is about is the next scribe is Emillio I.