October 5th-- Nick Kim

 Today we did our second lab, it was about heating and cooling of dodecanoic acid. what we try to find out in this lab was, what temperature makes solid dodecanoic aid into liquid and what temperature makes liquid temperature in to solid again.

 Part1: In heating process

we put test tube(dodecanoic aid) into hot water(55C) , and waited about 7 min, when temperature of the dodecanoic reached little higher than 50C, it melted

 Part 2: cooling process 

 we put test tube(dodecanoic aid, solid) into tap water, and waited about 9 min, when temperature of the dodecanoic reached about 25C it became solid