c) The standard enthalpies of formation and molar entropies of phosgene, carbon monoxide, and chlorine are...
c) The standard enthalpies of formation and molar entropies of phosgene, carbon monoxide, and chlorine are COCl2(g): ΔfH° = -220.08 kJ mol-1; S° = 283.8 J mol-1 K-1 CO(g): ΔfH° = -110.53 kJ mol-1; S° = 197.66 J mol-1 K-1 Cl2(g): ΔfH° = 0 kJ mol-1; S° = 223.08 J mol-1 K-1
i) Determine the reaction Gibbs energy for the decomposition of phosgene at 298 K. Is this reaction spontaneous at this temperature? [25 marks]
ii) At what temperature does the decomposition of phosgene become spontaneous? [15 marks]
iii) For an equilibrium mixture of phosgene, carbon monoxide, and chlorine gas would the each of the following move the equilibrium towards the reactants or products?
• Addition of carbon monoxide
• Removal of chlorine
• Increasing the temperature
• Decreasing the pressure
Homework Answers
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c) The standard enthalpies of formation and molar entropies of
phosgene, carbon monoxide, and chlorine are...
Phosgene (COCl2) is a toxic substance that forms readily from carbon monoxide and chlorine at elevated...
Phosgene (COCl2) is a toxic substance that forms readily from carbon monoxide and chlorine at elevated temperatures: CO(g) + Cl2(g) ⇌ COCl2(g) If 0.390 mol of each reactant is placed in a 0.500−L flask at 600 K, what are the concentrations of all three substances at equilibrium (Kc = 4.95 at this temperature)? Substance Concentration (M) CO Cl2 COCl2
c Given the following standard molar entropies of formation (S) and enthalpies of combustion to gaseous...
c Given the following standard molar entropies of formation (S) and enthalpies of combustion to gaseous carbon dioxide and liquid water at 25 °c (AHe AH/kJ mol 393.5 -285.9 -1559.7 C(graphite) H2(g) C2Ho(g) 5.9 131.0 229.5 Calculate the enthalpy change (AH) and Gibbs energy change (AG) for the reaction 2C(graphite) +3H28)CH) datseatt Is this reaction thermodynamically possible? Give a reason for your answer. (10 marks) Explain why it is possible for endothermic processes to occur spontaneously. 15 marks]
Carbon monoxide and chlorine gas react to form phosgene: CO(g)+Cl2(g)?COCl2(g) Kp = 3.10 at 700 K....
Carbon monoxide and chlorine gas react to form phosgene: CO(g)+Cl2(g)?COCl2(g) Kp = 3.10 at 700 K. If a reaction mixture initially contains 193 torr of CO and 294 torr of Cl2, what is the mole fraction of COCl2 when equilibrium is reached?
Carbon monoxide and chlorine gas react to form phosgene: CO(g)+Cl2(g)⇌COCl2(g) Kp = 3.10 at 700 K...
Carbon monoxide and chlorine gas react to form phosgene: CO(g)+Cl2(g)⇌COCl2(g) Kp = 3.10 at 700 K Part A If a reaction mixture initially contains 245 torr of CO and 449 torr of Cl2, what is the mole fraction of COCl2 when equilibrium is reached?
Carbon monoxide and chlorine gas react to form phosgene: CO(g)+Cl2(g)?COCl2(g) Kp = 3.10 at700 K If...
Carbon monoxide and chlorine gas react to form phosgene: CO(g)+Cl2(g)?COCl2(g) Kp = 3.10 at700 K If a reaction mixture initially contains 172torr of CO and 357torr of Cl2, what is the mole fraction of COCl2when equilibrium is reached?
Carbon monoxide and chlorine gas react to form phosgene: CO(g)+Cl2(g)⇌COCl2(g) Kp = 3.10 at 700 K...
Carbon monoxide and chlorine gas react to form phosgene: CO(g)+Cl2(g)⇌COCl2(g) Kp = 3.10 at 700 K If a reaction mixture initially contains 274 torr of CO and 298 torr of Cl2 , what is the mole fraction of COCl2 when equilibrium is reached? The answers I tried that were INCORRECT are 0.21, 0.28, 0.89, 0.47
Phosgene can dissociate into carbon monoxide and chlorine COC2g)CO Cl2(g) At 600 °C, the equilibrium constant...
Phosgene can dissociate into carbon monoxide and chlorine COC2g)CO Cl2(g) At 600 °C, the equilibrium constant in terms of pressures, Kp, for this dissociation reaction is 5.00. (a) If 11.56 g of phosgene is placed in a 17.60-L vessel and heated to 600 °C, what is the partial pressure of carbon monoxide when equilibrium is attained? atm (b) What fraction of phosgene is dissociated at equilibrium?
Chemists studied the formation of phosgene by sealing 0.80 atm of carbon monoxide and 1.33 atm...
Chemists studied the formation of phosgene by sealing 0.80 atm of carbon monoxide and 1.33 atm of chlorine in a reactor at a certain temperature. The pressure dropped smoothly to 1.59 atm as the system reached equilbrium. Calculate Kp (in atm-1) for CO(g) + Cl2(g) ↔ COCl2(g)
Using the table of standard entropies and enthalpies of formation, calculate AH°, ASº, and AG° for...
Using the table of standard entropies and enthalpies of formation, calculate AH°, ASº, and AG° for the following reactions at 298.15 K. (Use only the table of standard entropies and standard enthalpies of formation, not the table of standard Gibbs free energies.) kJ AH; () AS; mol-K mol Compound C(s) 5.7 CO(g) -110.5 197.7 The equation SiO2(s) + 2 Mg(s) Si(s) + 2 CO2(g) -393.5 213.8 MgO(s) C2(g) 223.1 H2(g) 130.7 • AH° kJ HCl(g) 186.9 -92.3 • AS° MK...
At 373 K, the following reaction has an equilibrium constant, K = 1.2 x10-2 COCl2 (s) ↔ CO (g) + Cl2 (g) If 1.00 mol of phosgene, COCl2 , is placed in a 10.0 L flask, calculate the concentration of carbon monoxide, CO, at equilibrium.
At 373 K, the following reaction has an equilibrium constant, K = 1.2 x10-2 COCl2 (s) ↔ CO (g) + Cl2 (g) If 1.00 mol of phosgene, COCl2 , is placed in a 10.0 L flask, calculate the concentration of carbon monoxide, CO, at equilibrium.
c Given the following standard molar entropies of formation (S) and enthalpies of combustion to gaseous carbon dioxide and liquid water at 25 °c (AHe AH/kJ mol 393.5 -285.9 -1559.7 C(graphite) H2(g) C2Ho(g) 5.9 131.0 229.5 Calculate the enthalpy change (AH) and Gibbs energy change (AG) for the reaction 2C(graphite) +3H28)CH) datseatt Is this reaction thermodynamically possible? Give a reason for your answer. (10 marks) Explain why it is possible for endothermic processes to occur spontaneously. 15 marks]
Phosgene can dissociate into carbon monoxide and chlorine COC2g)CO Cl2(g) At 600 °C, the equilibrium constant in terms of pressures, Kp, for this dissociation reaction is 5.00. (a) If 11.56 g of phosgene is placed in a 17.60-L vessel and heated to 600 °C, what is the partial pressure of carbon monoxide when equilibrium is attained? atm (b) What fraction of phosgene is dissociated at equilibrium?
Using the table of standard entropies and enthalpies of formation, calculate AH°, ASº, and AG° for the following reactions at 298.15 K. (Use only the table of standard entropies and standard enthalpies of formation, not the table of standard Gibbs free energies.) kJ AH; () AS; mol-K mol Compound C(s) 5.7 CO(g) -110.5 197.7 The equation SiO2(s) + 2 Mg(s) Si(s) + 2 CO2(g) -393.5 213.8 MgO(s) C2(g) 223.1 H2(g) 130.7 • AH° kJ HCl(g) 186.9 -92.3 • AS° MK...
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