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Toluene is manufactured by the catalytic conversion of n-heptane according to the reaction: C7H16 → C6H5CH3 + 4H2 The n-heptane is fed to the reactor at a temperature of 400°C and the reaction goes to 20% completion. a) Choosing a suitable basis, calculate the number of moles of all components in the product stream. [2 marks] b) Write an energy balance for the system stating the references and any assumptions clearly. [2 marks] c) Calculate the standard heat of reaction at 25°C. [4 marks] d) Calculate how much heat has to be added or removed from the reactor to make it isothermal at 400°C. State any assumptions clearly. [4 marks] Data: Standard heats of formation at 1 atm and 25°C: n-heptane (l) -53.630 kcal/mole CO2 (g) -94.052 kcal/mole H2O (g) -57.798 kcal/mole Standard heat of combustion at 1atm and 25°C: Toluene (l) -934.5 kcal/mole Latent heat of vaporization at 1atm and 25°C: H2O 10.52 kcal/mole
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![Toluene is manufactured by the catalytic conversion of n-heptane according to the reaction: C7H16 → C6H5CH3 + 4H2 The n-heptane is fed to the reactor at a temperature of 400°C and the reaction goes to 20% completion. a) Choosing a suitable basis, calculate the number of moles of all components in the product stream. [2 marks] b) Write an energy balance for the system stating the references and any assumptions clearly. [2 marks] c) Calculate the standard heat of reaction at 25°C. [4 marks] d) Calculate how much heat has to be added or removed from the reactor to make it isothermal at 400°C. State any assumptions clearly. [4 marks] Data: Standard heats of formation at 1 atm and 25°C: n-heptane (l) -53.630 kcal/mole CO2 (g) -94.052 kcal/mole H2O (g) -57.798 kcal/mole Standard heat of combustion at 1atm and 25°C: Toluene (l) -934.5 kcal/mole Latent heat of vaporization at 1atm and 25°C: H2O 10.52 kcal/mole](https://numengineering.com/wp-content/uploads/2024/12/Screenshot-2024-12-09-164955.png)
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