ChemLabReport - Measurement Kerri Yohe CRN 91502 Craig...

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Unformatted text preview: Measurement Kerri Yohe CRN 91502 Craig Tollin Measurement Name: Kerri Yohe Date Performed : 9/11/09 Partner: Makayla, Elizabeth Date Submitted : 9/18/09 Objective: To measure temperature changes in water under different experimental conditions and to become familiar with common laboratory equipment and measuring Experimental Data/Observations : Cooling of Water Time (Min.) Temp . (Therm.) Temp . (Probe) 62.1 69.50 5 46.0 53.76 10 37.1 44.34 15 34.0 39.00 20 30.5 35.66 25 28.1 32.77 30 26.9 30.16 35 25.8 28.78 40 25.0 27.56 45 24.1 26.10 50 25.5 25.12 55 23.0 24.39 60 22.8 23.70 Sample Calculations : Mass of Cold Water: Density = .9982-83 * (.0019) = .9979 @ 20.83C 5 Mass= 50 mL * .9979 = 49.895= 49.90 G H T T H- mass of hot water times its temperature change Q= mass x specific heat capacity x T 48.85*12.53= 612.09 G C T C- mass of cold water times its temperature change 49.90*38.79= 1935.62 Results and Conclusions : If one refers to graph 1, it should be noted that the two lines are not straight, and the two lines are...
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This note was uploaded on 10/26/2009 for the course CHEM 1045 at Virginia Tech.

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ChemLabReport - Measurement Kerri Yohe CRN 91502 Craig...

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