Ch. 17 - 1036 Chapter 17 1 of 23 1036 Chapter 17 3 of 23...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
1036 Chapter 17 1 of 23 Chapter 17 Equilibrium: The extent of Chemical Reactions Demonstration: 2 Mg(s) + O 2 (g) 2 MgO(s) Observations: Evaporation vs. condensation: Vapor Pressure Equilibrium: H O( ) 2 A HO (g ) 2 1036 Chapter 17 2 of 23 N 2 O 4 /NO 2 System: N 2 O 4 (g) 2NO 2 (g) Time (s) 1.6 1.2 0.8 0.4 0.0 02 0 4 0 6 0 8 0 1 0 0 NO 2 NO 24 1036 Chapter 17 3 of 23 Rate of consumption of N 2 O 4 : Rate of production of NO 2 : How do we explain this? 2NO 2 (g) N 2 O 4 (g) Equilibrium: N 2 O 4 (g) 2NO 2 (g) 1036 Chapter 17 4 of 23 Experiment 1 Experiment 2 Experiment 3 Initial P (atm) Equilibrium P (atm) Initial P (atm) Equilibrium P (atm) Initial P (atm) Equilibrium P (atm) P N 2 O 4 = 1.00 P NO 2 = 0.00 P N 2 O 4 = 0.22 P NO 2 = 1.56 P N 2 O 4 = 0.00 P NO 2 = 1.00 P N 2 O 4 = 0.07 P NO 2 = 0.86 P N 2 O 4 = 1.00 P NO 2 = 1.00 P N 2 O 4 = 0.42 P NO 2 = 2.16 = ) ( ) ( = p ) P ( 2 O N 2 NO 4 2 2 = ) ( ) ( = p ) P ( 2 O N 2 NO 4 2 2 = ) ( ) ( = p ) P ( 2 O N 2 NO 4 2 2 NO (g) 2NO (g) 2 P r e s u ( a t m ) Time (s) Experiment 1 1 Time (s) Experiment 2 1 Time (s) Experiment 3 1 2 2 2 rinted with FinePrint - purchase at www.fineprint.com
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
1036 Chapter 17 5 of 23 Observation: Equilibrium constant, K: aA(g) + bB(g) cC(g) + dD(g) K p = ( ) () cd ab pC pD p Ap B K c = [ ] [ ] [] CD AB 1036 Chapter 17 6 of 23 Example Problem : Write the equilibrium constant expression for the following reaction using pressure and then using concentration: 2CO(g) + O 2 (g) 2CO 2 (g) Heterogeneous Equilibrium: NEVER include in the equilibrium constant expression: 1036 Chapter 17 7 of 23 Example Problem : Write equilibrium constant expressions for the following reactions: (a) CaCO 3 (s) CaO(s) + CO 2 (g) (b) 2H 2
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 09/16/2008 for the course CHEM 1036 taught by Professor Amateis during the Spring '08 term at Virginia Tech.

Page1 / 6

Ch. 17 - 1036 Chapter 17 1 of 23 1036 Chapter 17 3 of 23...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online