The gas-phase dehydrogenation of propane is carried out according to the reaction C3H8 (g) ? C3H6 (g) + H2 (g). The reaction takes place in the presence of a catalyst in an isothermal reactor that is...

The gas-phase dehydrogenation of propane is carried out according to the reaction C3H8 (g) ? C3H6 (g) + H2 (g). The reaction takes place in the presence of a catalyst in an isothermal reactor that is maintained at 5 bar. Assume a gas mixture in the reactor is an ideal gas mixture. a) Calculate the equilibrium constant at 25 °C. (2 points) b) Calculate the standard enthalpy of reaction at 25 °C. Is the reaction exothermic or endothermic? (2 points) c) The reactor feed contains pure propane. If the desired conversion of propane is 95%, at what temperature should you run the reaction? Assume the reaction reaches equilibrium. (5 points) 2. Ethanol is produced from ethylene via the gas-phase reaction: ????2????4(????) + ????2????(????) ? ????2????5????????(????) Reaction conditions are 400 K and 2 bar. a) Determine the equilibrium constant K for this reaction at 25ºC. (2 points) b) Determine a value of K for this reaction at 400 K. (2 points) c) Determine the composition of the equilibrium gas mixture for an equimolar feed containing only ethylene and H2O. (5 points)


1. The gas-phase dehydrogenation of propane is carried out according to the reaction C3H8 (g) ↔ C3H6 (g) + H2 (g). The reaction takes place in the presence of a catalyst in an isothermal reactor that is maintained at 5 bar. Assume a gas mixture in the reactor is an ideal gas mixture. a) Calculate the equilibrium constant at 25 °C. (2 points) b) Calculate the standard enthalpy of reaction at 25 °C. Is the reaction exothermic or endothermic? (2 points) c) The reactor feed contains pure propane. If the desired conversion of propane is 95%, at what temperature should you run the reaction? Assume the reaction reaches equilibrium. (5 points) 2. Ethanol is produced from ethylene via the gas-phase reaction: ??2??4(??) + ??2??(??) ↔??2??5????(??) Reaction conditions are 400 K and 2 bar. a) Determine the equilibrium constant K for this reaction at 25ºC. (2 points) b) Determine a value of K for this reaction at 400 K. (2 points) c) Determine the composition of the equilibrium gas mixture for an equimolar feed containing only ethylene and H2O. (5 points)