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

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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 H O(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 0 20 40 60 80 100 NO 2 N O 2 4 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 N O (g) 2 4 2NO (g) 2 Pressure (atm) Time (s) Experiment 1 1 Pressure (atm) Time (s) Experiment 2 1 Pressure (atm) Time (s) Experiment 3 1 2 2 2 Printed with FinePrint - purchase at www.fineprint.com
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