PracticeExam1c_AnsKey

PracticeExam1c_AnsKey - 2 gas, 1-2% H 2 O gas). b) A...

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Tufts University – Chem 2 – Summer 2008 Practice Exam 1C – Answer Key
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X. Decomposition (6 points) Solid sodium hydrogen carbonate undergoes the following reversible decomposition reaction at 100 o C. 2 NaHCO 3 (s) Na 2 CO 3 (s) + CO 2 (g) + H 2 O(g) , K p = 0.23 atm 2 at 100 o C a) Explain why this reversible reaction proceeds to completion if NaHCO 3 (s) is heated at 100 o C in open container in ambient air (1 atm total pressure, 0.03% CO
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Unformatted text preview: 2 gas, 1-2% H 2 O gas). b) A mixture of 0.50 mol NaHCO 3 (s) and 0.50 mol Na 2 CO 3 (s) is placed in a 1.00-L closed container that has 1.00 atm partial pressure of CO 2 gas and 0.80 atm partial pressure of H 2 O vapor. Calculate the partial pressures of CO 2 gas and H 2 O vapor when chemical equilibrium is reached....
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PracticeExam1c_AnsKey - 2 gas, 1-2% H 2 O gas). b) A...

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