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07 HW - Equilibrium Systems KEY

# 07 HW - Equilibrium Systems KEY - Name_KEY Date WKST#16...

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Name: _______ KEY ________________________________ Date: ____________ WKST #16: Equilibrium Systems (40 points) Period: ___________ 1. Write the equilibrium expression (K eq ) for each of the following reversible reactions: a. C(s) + H 2 O(g) CO(g) + H 2 (g) K eq = [CO] [H 2 ] / [H 2 O] b. NH 4 NO 3 (s) N 2 O(g) + 2H 2 O(g) c. 2SO 2 (g) + O 2 (g) 2SO 3 (g) K eq = [SO 3 ] 3 / [SO 2 ] 2 [O 2 ] d. CO(g) + 3H 2 (g) CH 4 (g) + H 2 O(g) K eq = [CH 4 ] [H 2 O] / [H 2 ] 3 [CO] K eq = [N 2 O] [H 2 O] 2 / [NH 4 NO 3 ] 2. Provide the equilibrium expression and calculate the value of Q for each reaction below given the concentrations: a. C 2 H 6 (g) + Cl 2 (g) → C 2 H 2 Cl (s) + HCl (g) [C 2 H 6 ] = 0.0010 M [Cl 2 ] = 0.0020 M Q = [HCl] / [C 2 H 6 ] [Cl 2 ] [C 2 H 2 Cl] = 0.0030 M Q = [0.0045] / [0.0010] [0.0020] [HCl] = 0.0045 M Q = 2250 K eq = 5000 Which way does the reaction need to shift to reach equilibrium? Forward (towards products) b. N 2 (g) + 3H 2 (g) 2NH 3 (g) [N 2 ] = 0.25 M [H 2 ] = 0.10 M Q= [NH 3 ] 2 / [N 2 ] [H 2 ] 3 [NH 3 ] = 0.0034 M Q = [0.0034] 2 / [0.25] [0.10] 3 K eq = 0.046 Q = 0.046 Which way does the reaction need to shift to reach equilibrium? At equilibrium c. 2CO(g) + O 2 (g) 2CO 2 (g) [CO] = 0.50 M Q = [CO 2 ] 2 / [CO] 2 [O 2 ] [O 2 ] = 0.50 M Q = [2.5] 2 / [0.50] 2 [0.50] [CO 2 ] = 2.5 M Q = 50 K eq = 40 Which way does the reaction need to shift to reach equilibrium?

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07 HW - Equilibrium Systems KEY - Name_KEY Date WKST#16...

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