I have 2 questions and a table to be filled. Everything will be provided to work.
almnapnuri
thermodynamics__worksheet_vfall16_22.docx
PART 2: Dissolution of CaCl2
1. What is the balanced chemical equation for the dissolution of calcium chloride in water?
2. Proposed Initial Mass of CaCl2 to prepare 50 mL of 1M Solution:______________
Calculation of theoretical mass for a 1M solution in 50 mL water:
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Table 4: Calcium Chloride Experimental Temperatures |
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Temperature (ºC) |
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Time (s) |
Trial 1 |
Trial 2 |
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0 |
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15 |
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30 |
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45 |
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60 |
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75 |
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90 |
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105 |
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120 |
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135 |
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150 |
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165 |
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180 |
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Table 5: Calcium Chloride Experimental Data |
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Trial #1 |
Trial #2 |
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Mass of CaCl2 (g) |
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Volume of Water (mL) |
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Mass of Water (g) |
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Initial temperature, Ti (ºC) |
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Final temperature, Tf (ºC) |
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3. Fill in the following tables with the experimental data and results for part two.
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Table 6: Calcium Chloride Experimental Results |
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Trial #1 |
Trial #2 |
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Mass of Solution (g) |
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∆T (ºC) |
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qsurr (J) |
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qsys (J) |
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Moles of CaCl2 (mol) |
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∆Hrxn (kJ/mol) |
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∆S◦rxn (J/mol∙K) from handout |
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∆Grxn (kJ/mol) |
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Average ∆Grxn (kJ/mol) |
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Arizona State University 1 School of Molecular Sciences
