For the reaction N2O4 (g) = 2NO2 (g), Kc = 0.21 at 100 C. At a point during the reaction, [N2O4] = 0.12 M and [NO2] = 0.55 M. Is the reaction at equilibrium? If not, in which direction will it progress towards equilibrium?
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In the study of carbon oxidation, an evacuated vessel containing a small amount of powdered graphite (a form of solid carbon) is heated to 1080 K. Gaseous carbon dioxide is added to a pressure of 0.458 atm and CO forms. At equilibrium, the total pressure is 0.757 atm. Calculate Kc.
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In order to study hydrogen halide decomposition, a researcher fills an evacuated 2.00 L flask with 0.200 mol of HI gas and allows the reaction to proceed at 453 C.
At equilibrium, [HI] = 0.078 M. Calculate Kc.
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In the study of the conversion of methane to other fuels, a chemical engineer mixes gaseous methane and water in a 0.32 L flask at 1200 K. At equilibrium the flask contains 0.26 mol of CO, 0.091 mol of H2 and 0.041 mol of CH4. What is the [H2O] at equilibrium? Kc = 0.26 for this process at 1200 K.
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Fuel engineers used the extent of the change of CO and H2O to CO2 and H2 to regulate the proportions of synthetic fuel mixtures. If 0.250 mol of CO and 0.250 mol of H2O are placed in a 1.25 mL flask at 900 K, what is the composition of the equilibrium mixture? At this temperature, Kc is 1.56.
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The research and development unit of a chemical company is studying the reaction of CH4 and H2S, two components of natural gas. In one experiment, 1.00 mol of CH4, 1.00 mol of CS2, 2.00 mol of H2S, and 2.00 mole of H2 are mixed in a 250 mL vessel at 960C. If [CH4] = 5.56 M at equilibrium, what are the equilibrium concentrations of the other substances?
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Consider the reaction shown below. What are the partial pressures of reactants and products when the system achieves equilibrium?
Initial H2 = 1.00 atm; Initial I2 = 1.03 atm; Initial HI (g) = 0.00 atm
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Phosgene is a potent chemical warfare agent that is now outlawed by international agreement. It decomposes by the reaction shown below. Calculate [CO], [Cl2], and [COCl2] when the 5.00 mols of phosgene gas decompose and reach equilibrium in a 10.0 L flask.
Kc = 8.3 x 10-4 at 360C
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Consider the theoretical equilibrium shown below. Given that the equilibrium concentration of B is 2.20 M, determine the numerical value of Kc.
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Consider the theoretical equilibrium shown below. What is the equilibrium concentration of O2 (g) if initially only 0.300 M NO (g) was present?
Kc = 81.0
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Consider the reaction shown below. What is the equilibrium partial pressure of SO2 if the equilibrium partial pressures of O2 and SO3 are 0.43 atm and 1.56 atm, respectively.
Kp = 48.2
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Phosgene is a potent chemical warfare agent that is now outlawed by international agreement. Using the reaction given in the problem, calculate the equilibrium partial pressures of the three gases when the initial partial pressure of both CO and Cl2 are 0.210 atm.
Kc = 5.0 at 600 K
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Determine the equilibrium partial pressure of NH3 in a reaction vessel that initially contains 0.50 atm of H2 and 0.900 atm of N2.
Kp = 4.3 X 10-4
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