Chem 102 Lab 5 thermochemistry

Chem 102 Lab 5 thermochemistry - Experiment 5...

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Experiment 5 – Thermochemistry Data: Table 1: Calibration of the Thermometer Temperature Probe Thermometer Correction Water Temperature 22.3 o C 22.3 o C 0 Table 2: Determination of Heat Capacity of the Calorimeter Trial 1: Before mixing Time (min) Warmer water (temp. o C) Cooler water (temp. o C) 0 44.9 21.2 1 44.0 21.1 2 43.1 21.1 3 42.7 21.1 After mixing Time (min) Temperature of mixture of warm and cool water (temp. o C) 4 MIX 5 29.5 6 29.7 7 29.7 8 29.7 Trial 2: Before mixing Time (min) Warmer water (temp. o C) Cooler water (temp. o C) 0 51.7 23.0 1 51.0 22.7 2 50.1 22.6 3 49.8 22.6 After mixing Time (min) Temperature of mixture of warm and cool water (temp. o C) 4 MIX 5 33.7 6 33.8 7 33.8 8 33.7 1
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Trial 3: Before mixing Time (min) Warmer water (temp. o C) Cooler water (temp. o C) 0 44.5 21.5 1 44.0 20.2 2 43.5 20.0 3 43.0 19.9 After mixing Time (min) Temperature of mixture of warm and cool water (temp o C) 4 MIX 5 29.4 6 29.6 7 29.6 8 29.6 Table 3: Heats of Reaction Data Part 2 Part 3 Part 4 Part 5 Weight of NaOH 2.041 g 1.774 g Time (min) Temp. ( o C) Temp. ( o C) Temp. ( o C) Temp. ( o C) NaOH HCl NaOH Acetic Acid 0 23.7 21.0 23.1 21.0 22.6 23.6 1 23.7 21.0 23.0 21.0 22.3 23.4 2 23.7 21.0 23.0 21.1 22.2 23.5 3 23.8 21.0 23.0 21.6 22.2 23.5 4 MIX MIX MIX MIX 5 28.8 28.2 26.9 37.9 6 28.9 28.3 29.3 40.2 7 28.9 28.3 30.8 40.2 8 28.9 28.3 30.9 40.1 9 28.9 28.3 30.9 40.0 10 28.9 28.3 30.9 39.9 Results: Table 4: Summary of Calculations for the determination of the Heat Capacity of the Calorimeter Trial 1 Trial 2 Trial 3 Predicted temp. of warm water at mixing (at 4 min.) 42.1 o C 49.5 o C 42.5 o C Predicted temp. of 21.1 o C 22.6 o C 19.8 o C 2
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cool water at mixing (at 4 min.) Predicted temp. of mixed solution at mixing (at 4 min.) 29.4 o C 33.7 o C 29.3 o C Change in temp. of warm water on mixing ( T) 13.2 o C 16.1 o C 13.6 o C Change in temp. of cool water on mixing ( T) 8.4 o C 11.1 o C 9.5 o C Heat lost by warmer water 2758.8 J 3564.9 J
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This note was uploaded on 10/14/2008 for the course CHEM 102 taught by Professor Briggs during the Spring '08 term at University of Victoria.

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Chem 102 Lab 5 thermochemistry - Experiment 5...

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