# ws10f09 - 2 O g 2H 2g O 2g Æ 2H 2 O g 2H 2 O g Æ 2H 2g O...

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Fall 09 CH301 Worksheet 10 Thermodynamic Calculations for Chemical Reactions and Phase Changes Assume T = 298K. First describe the reaction below where it is written, then predict the sign for each answer and only then, do the calculation. The BE values are at the bottom of the worksheet. The formation constants are found in the textbook appendix and also as Worksheet 10a at http://courses.cm.utexas.edu/dlaude/ch301/worksheetsf09.html This worksheet is painful at first, but once you get it you are a profoundly better chemist (and exam 3 test taker.) Chemical Reaction Δ H (kJ) BE (kJ) Δ n gas w (kJ)= - Δ nRT Δ n system ΤΔ S (kJ) Δ G (kJ) CH 4g + 2O 2g Æ CO 2g + 2H

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Unformatted text preview: 2 O g 2H 2g + O 2g Æ 2H 2 O g 2H 2 O g Æ 2H 2g + O 2g C 2 H 5 OH l + 3O 2g Æ 2CO 2g + 3H 2 O g C 2 H 5 OH l + 3O 2g Æ 2CO 2g + 3H 2 O l C 3 H 8g + 5O 2g Æ 3CO 2g + 4H 2 O g 4H 2 O g + 3 CO 2 g Æ C 3 H 8g + 5O 2g CCl 4l Æ C s + 2Cl 2g Ba(OH) 2 (H2O) 8s + 2NH 4 NO 3 Æ Ba(NO 3 ) 2 s + 2NH 3g + 10H 2 O l 2O 3g Æ 3O 2g H 2 O s Æ H 2 O l CO 2g Æ CO 2s NH 3g + HCl g Æ NH 4 Cl s 2H 2 O 2l Æ 2H 2 O l + O 2 g Bond Energy Table (in addition, assume C=O is 799 kJ/mol for carbon dioxide) Thermodynamic Data for Chemical Compounds Including Formation Data is found at http://courses.cm.utexas.edu/dlaude/ch301/worksheetsf09.html...
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