ma 1-27 Quiz 3 Answer Key

ma 1-27 Quiz 3 Answer Key - Reactants 3.06 If the students...

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Chemistry 106 Recitation 1-27 Name: Section: 1. For the expression: N 2 O 4 (g) h2NO 2 (g) K p = 15 @ 95 ° C a. What are the equilibrium partial pressure of N 2 O 4 (g) and NO 2 (g) if the initial concentrations are P N2O4 = 2.00 atm and P NO2 = 0.00 atm ? [3 pt] N 2 O 4 h 2NO 2 I 2.00 O C -x +2x E 2.00-x 2x After solving for the quadratic x=1.44 N 2 O 4 = 2.0-1.44= .56 atm NO 2 = 2x = 2.88 b. After equilibrium is achieved in part (a), P N2O4 = 2.50 atm and P NO2 = 5.86 atm are added to the same reaction vessel, which direction would the reaction favor assuming the same reaction occurred at 95 ° C? [2pt] . 56+2.5= 3.06 atm N 2 O 4 2.88+5.86= 8.74 atm NO 2 Products = 8.74 2 = greater than 15 so the reaction shifts left to reach equilbrium
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Unformatted text preview: Reactants 3.06 If the students make an ICE table and want the new equilibrium values they are N 2 O 4 = 3.68 atm and NO 2 = 7.49 atm 2. The following reaction is at equilibrium C (s) + H 2 O (g) ⇋ CO (g) + H 2(g) ΔH= 131.5 Predict the direction in which the equilibrium position will shift if the following changes are made (i.e. right or left). [.5 pts each] a. (H 2 O) is increased Right b. The amount of C (s) is increased Neither c. The total pressure is increased by adding Cl 2 gas Neither d. The temperature is increased Right Chemistry 106 Recitation 1-27...
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