Lecture_Notes_101409b

# Lecture_Notes_101409b - 3 y Δ G f o NH 3 =-16.5 kJ/mol...

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Midterm Grade Estimates F 0 - 76 D 77 – 88 C- 89 – 111 C 112 – 129 C+ 130 – 139 B- 140 – 142 B 143 – 152 B+ 153 – 158 A- 159 – 164 A 165 – 200 Grade Sum of Scores from E1 and E2

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No More ALEKS y ALEKS is still available to you if you wish to continue using it, but it is no longer required for chapters 16 – 22. y I will count the work that you have done through chapter 15. y There will be web quizzes for the rest of the chapters through the 105 b course website, under assignments. y Chapter 16 web quiz will open today and close next Tuesday (10/20) at 5 pm.
Standard Free Energy and Pressure y S large volume > S small volume y S low pressure > S high pressure y G = G o + RT ln(P) R = 8.314 J/K*mol T = Temp in K

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Standard Free Energy and Pressure
Standard Free Energy and Pressure y Calculate the free-energy change for the formation of ammonia at 25 o C given the following sets of partial pressures: y 1.0 atm N 2 , 3.0 atm H 2 , 0.020 atm NH 3 y 0.010 atm N 2 , 0.030 atm H 2 . 2.0 atm NH

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Unformatted text preview: 3 y Δ G f o NH 3 = -16.5 kJ/mol Free Energy of a Chemical Reaction Free Energy of a Chemical Reaction Free Energy and Equilibrium y Equilibrium Point – occurs at the lowest value of free energy available to the reaction system: G prod = G react Free Energy and Equilibrium y Methanol (CH 3 OH) is synthesized industrially by the reaction: CO (g) + 2 H 2 (g) ↔ CH 3 OH (g) . Use thermodynamic data to calculate the equilibrium constant for this reaction at 25 o C. Δ G o-137.2 kJ/mol (CO), -166.4 kJ/mol (CH 3 OH). If ∆ G sys = 0, which of the following is true? K = 1 K < 1 > The system is at equil. .. 53% 40% 4% 4% 1. K = 1 2. K < 1 3. K > 1 4. The system is at equilibrium Free Energy and Equilibrium y Given values of Δ G o f at 25 o C for liquid ethanol (-174.9 kJ/mol) and gaseous ethanol (-168.6 kJ/mol), calculate the vapor pressure of ethanol at 25 o C....
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## This note was uploaded on 10/20/2009 for the course CHEM 105BLG taught by Professor Parr during the Fall '08 term at USC.

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Lecture_Notes_101409b - 3 y Δ G f o NH 3 =-16.5 kJ/mol...

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