QUIZ #3
SC112, Spring 2016
Prof. M. Elert
NAME
R = 8.314 J mol- 1 K- 1 = .08206 L atm mol-I K- 1
T(K) = T(°C) + 273.15
The equilibrium coustant Kp for the reaction 2NO(g) + Bn(g)
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2NOBr(g) is 18.4 at 25°C.
1. (4 points) What is the value of Kp for the reaction 2NOBr(g) .z 2NO(g) + Br2(g) at 25°C?
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2. (4 points) What is the value of Kc (that is, with concentrations expressed in mollL) for the reaction
2NO(g) + Br2(g) .z 2NOBr(g) at 25°C? 2-3
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3. (4 points) If an e!luilibriu1ll mixture of Br2, NO, and NOBr at 25 C contains Br2 at a pressure of 0.15 atm and
NO at a pressure of 0.25 atm, what is the partial pressure of NOBr?
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4. (4 points) If a mixture of Br2, NO, and NOBr at 25°C is prepared in which PBr2
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PNOBr = 0.10 atm,
which way will the reaction 2NO(g) + Br2(g) .z 2NOBr(g) proceed? Explain.
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5. (4 points) Suppose that 2.00 atm of pure NOBr is placed into a container at 25°C and the system is allowed to
come to equilibrium. What is the final pressure ofBr2(g), in atm?
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