C2.40 Equilibrium Stations

Name: Period: Date: Equilibrium Stations WS: Answer questions directly below each question, it is formatted to show up in red Station #1: Concepts • Equilibrium is microscopically dynamic but macroscopically static. Explain what this means. basically the reverse rate will temporarily exceed the forward rate and change comp • Explain what it means when a reaction "has reached a state of chemical equilibrium." when forward and reverse action rate are equal • How does the fact that an equilibrium is heterogeneous influence the expression we write for the equilibrium constant for the reaction? Station #2: Equilibrium Constant • Write an equilibrium expression for each of the following reactions. • 3 O 2 ( g ) <===> 2 O 3 ( g ) keq=o2}2/ • H 2 ( g ) + I 2 ( g ) <===> 2 HI ( g ) keq= [HI] / [h2][I2] • PCl 5 ( g ) <===> PCl 3 ( g ) + Cl 2 ( g ) keq= [pci3][Cl2] / [PCI5] • Calculate the equilibrium constant (K) for the following reaction: H 2 ( g ) + I 2 ( g ) <==> 2 HI( g ) The equilibrium concentrations at 25 °C were found to be: [H 2 ] = 0.0505 M, [I 2 ] = 0.0498 M, [HI] = 0.389 M keq= .389mc/.0505m)(.o498m Keq= 60.2 • Write the expression for K for the following processes • ZrI 4 ( s ) <===> Zr ( s) + 2I 2 ( g ) {1 2}2