ࡱ;  R F:Łu@CompObj\WordDocument&ObjectPool:Łu:Łu FMicrosoft Word 6.0 DocumentNB6WWord.Document.6;  Oh+'0  ! -9A IUr z5Science F:Microsoft Office:Microsoft Word 6:chem labLAB: TITLE OF LABsciencescience'@6敽@Reꕽ@Nd`u@ܥhO e9&C ""#####4v$v$v$v$v$$ $(v$t%f$$$$$%%%L%N%N%N%N%N%N%&%X2&gt%#% $@%%%t%%##$$%%%%#$#$L%2$@$6####%L%%H%Lab: Specific Heat of Liquids  Introduction The development of chemistry and physics took a dramatic leap forward in the nineteenth century with the synthesis of the kinetic molecular theory of heat. Since that time the interrelation of matter and energy has been of fundamental importance to an understanding of the nature of matter itself. In this experiment, you will qualitatively study the energy absorption properties of some liquids and determine their specific heats. Since the heat absorbed by a substance depends on the amount of substance, the specific heat has been defined as the amount of heat to raise the temperature of 1.00 gram of substance by 1.0oC. In this experiment, you will also make use of a great generalization spawned by thousands of experimental observations, namely, the Law of Conservation of Energy. MATERIALS thermometer heating coil 200 g of water in a 250 mL beaker preweighed samples of the following liquids: 200 g of 1-propanol (n-propyl alcohol) 200 g of 1,2 ethanediol (ethylene glycol) 200 g of 1, 2, 3 propanetriol (glycerine) 200 g of 1M CuSO4 200 g of 1M NaCl  Procedure 1. Measure out 200 g of water. Record the initial temperature of the water. 2. Place the heating coil in the water, plugit in and record the temperature every 10 seconds for 2 minutes. Be sure to stir the liquid continuously. 3. Unplug the coil and remove it from the liquid. 4. Clean the coil. 5. Repeat steps 2, 3, and 4 for each ofthe 5 preweighed liquid samples. (When you have finished with one of these preweighed samples of liquid, place the liquid in ice to cool for the next lab group. 6. Graph all 6 heating curves on one set of axes. Record temeprature on the y-axis and time on the x-axis. 7. Calculate the specific heats of the 5 liquids. Remember that water is the standard for heat measurement. Data timewaterpropanolethylene glycolglycerinecopper sulfatesodium choride0102030405060708090100110120 Calculations 1. Determine the heat the coil gave to the water. Remember that HEAT = amount of water x specific heat x change in temeprature You now know the amount of heat the coil gives off in 2 minutes. The heating coil has been standardized to water, the standard for heat measurement. 2. Now calculate the specific heats of the 5 liquids. Remember that you know the heat given to each liquid from the standardized heating coil. You know the amount of material and the temperature change. Therefore, the specific heat of each liquid can be calculated. Be sure to include units with your answers. HEAT = amount x specific heat x change in temperature Analysis Write a conclusion. Include the specific heats you determined. Compare them with water. STATES OF MATTER: HEATS Name: _______________________ Partner #1: _______________________ Partner #2: _______________________ Acton-Boxborough Regional High School Due Date: ______________________ Acton-Boxborough Regional High School  |HH(EG(HH(d'p|HH(EG(HH(d'p |HH(EG(HH(d'p00&ta0`0(00&00&00&00&00&ࡱ; SummaryInformation(Microsoft Word 6.0.16ࡱ;  !/uvwxY [ \ b 5 6 C BC[489uU]cU]c]h]uD]a UZ]c( UZ]c(! ./ Z[>GHR_mH_uw 9m; q } X Y Z [ $$$,$,$$$$$$$$$$$$$$$$$$$$$,h*[ a b g m v $,$,8l XD L$ 8l XD L$  l &D L$ 8l XD L$               l &D L$ '         ! " # $ % & ' ( , - . / 0 1 2 3 4 5 C $$$,$$$$hl &D L$ l &D L$  ! a b  { Cz  6789$$$$$$$$$$$$$,$$ 0 !l h !s0h !shK@Normal]a .@. Heading 1 < U]ck,@, Heading 2 < UV]c*@* Heading 3 <U]c"A@"Default Paragraph Font @ Header ! @ Footer !/@Listh*O"* Chem HeaderL UZ]c2@2List 23@BList 38$D@R$ List ContinuehxB@b Body TextxZ9 9KXj;Z39  [  9 9  w[5 9 FvHscience=Science F:Teacher Folders:Murphree:Specific Heat Lab-liquids @fMTimes New Roman Symbol MArial MTimesMNew Century SchlbkMHelvetica"1hmb&q3Fb&"!g4Science F:Microsoft Office:Microsoft Word 6:chem labLAB: TITLE OF LABsciencescienceࡱ;