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CourseHeroChemLab1

# CourseHeroChemLab1 - Date Performed Date Submitted...

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Date Performed: 2/1/2008 Name: removed Date Submitted: 2/8/2008 Partner: removed Instructor: Shengliang Zhao Measurement 1 Objective: The objective of this lab was to measure temperature changes in water under different experimental conditions. Experimental Data: Thermometer Calibration- Probe Temperature 20.31°C Thermometer Temperature 20.5°C Part A Time (minutes) 0 5 10 15 20 25 30 Temperature of water in beaker (°C) 68.3 49.8 41.5 37.2 34.9 32.2 30.2 Temperature of water in foam cup (°C) 66.91 53.67 47.62 41.98 39.33 35.92 33.91 Time (minutes) 35 40 45 50 55 60 Temperature of water in beaker (°C) 28.2 26.7 26.2 25.2 25.1 24.7 Temperature of water in foam cup (°C) 32.65 31.44 30.43 29.16 28.17 27.75 Part B Cold water temperature 16.48°C Step Volume in cup (mL) Volume added (mL) Initial temp (°C) Final temp (°C) 1 50.00 10.13 67.52 48.71 2 60.13 10.01 48.71 43.26 3 70.14 9.94 43.26 39.47 4 80.08 10.13 39.47 36.37 5 90.21 9.82 36.37 34.20 Sample Calculations: Part A Correction factor= probe temp- thermometer temp 20.31-20.5= -0.2°C Corrected thermometer temp= measured temp + correction factor 68.3 + -0.2 = 68.1°C Part B

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Density = mass/volume mass= density*volume Step 1 mass = density @ 67.52°C * 50.00mL = .9791888g/mL* 50.00mL = 48.96 Results and Conclusions:
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