# Lecture23_upload - Exam III Tuesday at 6:30 PM Chapters 5...

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Unformatted text preview: Exam III : Tuesday at 6:30 PM Chapters 5 and 19: ~ 16-17 questions Titrations and buffers: ~ 3-4 questions On Monday: Review H2O ( l ) H2O ( g ) Calculate the vapor pressure of water at 298K. It is approx: ∆ G o = +8.57 kJ/mol A. 0.01 atm B. 0.02 atm C. 0.03 atm D. 0.04 atm E. 0.05 atm A. B. C. D. E. H2O ( l ) H2O ( g ) Neglecting the temperature-dependence of ∆ H o and ∆ S o, estimate the boiling temperature of water: H2O ( l ) H2O ( g ) ∆ H of (kJ/mol) S o (J/mol.K)-285.83 69.95-241.83 188.84 A. 90oC B. 94oC C. 97oC D. 103oC Neglecting the temperature-dependence of ∆ H o and ∆ S o, estimate the boiling temperature of water at the top of mount Everest, where the pressure is about 0.26atm: H2O ( l ) H2O ( g ) ∆ H of (kJ/mol) S o (J/mol.K)-285.83 69.95-241.83 188.84 A. 55oC B. 65oC C. 75oC D. 85oC Fe2O3 (s) + 2Al (s) → 2 Fe( s ) + Al2O3 (s) M (g/mol) H of (kJ/mol) S o (J/mol K) C (J/gK) Fe2O3 (s) 160-825.5 87.40 Al (s) 27 28.30 0.897 Fe(s) 56 27.78 0.449 Fe(l) 56 12.4 34.76 0.821 Al2O3 (s) 102-1675.7 50.92 C12H22O11 (s)...
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Lecture23_upload - Exam III Tuesday at 6:30 PM Chapters 5...

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