HW11 - Chemistry 111 Homework #11 Due: November 30, 2005...

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Chemistry 111 Homework #11 Due: November 30, 2005 (Wednesday) 1. Calculate the numerical value for the equilibrium constant for the following reaction at 298 K: ( Δ f for NOCl = + 66.70 kJ/mol). The one for NO is + 86.69 kJ/mol. 2 NO (g) + Cl 2 (g) 2 NOCl (g) a) 1.02 × 10 +7 b) 2.03 × 10 -12 c) 1.02 d) 9.82 × 10 -8 e) 4.92 × 10 +11 f) None of these. 2. Calculate the numerical value for the equilibrium constant for the following reaction at 298 K. The Δ f for N 2 O is + 104.18 kJ/mol. The one for NO can be obtained from a previous question. N 2 O (g) + 1/2 O 2 (g) 2 NO (g) a) 9.55 × 10 2 b) 1.24 × 10 12 c) 1.05 × 10 -3 d) 7.41 × 10 -13 e) 0.973 f) None of these. 3. Calculate the numerical value for the equilibrium constant for the reaction below at 298 K. The Δ f for NH 4 Cl, NH 3 , and HCl are – 202.87, - 16.45, and – 95.299 kJ/mol, respectively. NH 4 Cl (s) NH 3 (g) + HCl (g) a) 9.40 × 10 15 b) 1.82 × 10 -22 c) 1.07 × 10 -16 d) 2.25 × 10 -14 e) 1.00 f) None of these. 4. Determine the equilibrium constant (Kp) for this reaction. a) 4.34 b) 0.230 c) 2.59 d) 2.64 × 10 -65 e) 3638 f) None of these. 5. Let’s say that we mix initially in a flask at 298 K the gases HA, O 2 , and A 2 O 6 , at partial pressures of 0.555, 1.00, and 0.100 atm, respectively, together with a substantial amount of liquid water. Will the reaction proceed spontaneously toward the formation of A 2 O 6 ? Type the word yes , no , or cannot tell in Blackboard.
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Chemistry 111 2 Homework #11 / Fall 2005 For Fun! Answer the following question on your own. Of course, not being a multiple choice question, you do not have to turn it in. Sketch an approximate plot of G versus Q for this reaction. Label the axes and show where Kp is in this plot. Also, mark your value for Q in the previous question (problem 42 ) and explain briefly how this corroborates your conclusion in the previous question. 6. Assuming that both Δ H° and Δ S° are temperature independent, determine the numerical value of Kp at 325 K. a) 15,500
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This note was uploaded on 02/08/2010 for the course CHEM 111 taught by Professor Kenney during the Spring '08 term at Case Western.

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HW11 - Chemistry 111 Homework #11 Due: November 30, 2005...

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