CH301 Worksheet 11 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 11a at http://courses.cm.utexas.edu/dlaude/ch301/worksheetsf08.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 ΔH (kJ) BE (kJ) Δngasw (kJ)= -ΔnRT ΔnsystemΤΔS (kJ) ΔG (kJ) CH4g + 2O2g CO2g + 2H2Og 2H2g + O2g 2H2Og 2H2Og 2H2g + O2g C2H5OHl + 3O2g 2CO2g + 3H2Og C2H5OHl + 3O2g 2CO2g + 3H2Ol C3H8g + 5O2g 3CO2g + 4H2Og 4H2Og + 3 CO2g C3H8g + 5O2g CCl4l Cs + 2Cl2gBa(OH)2(H2O)8s + 2NH4NO3 Ba(NO3)2s + 2NH3g + 10H2Ol 2O3g 3O2g H2Os H2Ol CO2g CO2s NH3g + HClg NH4Cls 2H2O2l 2H2Ol + O2 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
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