Problems sheet No. 4 1- The gas phase reaction A-38 is zero order, the initial calculation of A is 2 moldm' and the system contains 40 % inert. The reaction rate constant is 0.1 mol/dm3.min. Calculate the time needed achieve 80 % conversion, when the reaction is carried out in a batch гсаctor. 2- A reaction A+BC which is first order with respect to each of the reactants with a reaction rate constant of 9.92 x 10' m'kmol.s at 25 °C. volume changes on reaction may be neglected. The reaction is carried out in a well-stirred isothermal batch reactor. Determine the reaction time necessary to achieve 95 % conversion of B using initial concentrations of 0,1 and 0.08 kmol/m' for A and B respectively. 3- A gas phase decomposition A→R+S is carried out in a batch reactor with initial conditions of To= 300 K, P, (total pressure) = 5 atm and Va = 0.5 m. The rate constant is k = 10"exp(-10000/T) h. The heat of reaction is -1500 kcal/kmol and the heat capacity of A, R and S are 30, 25 and 20 kcal/kmol.K respectively. Compute the conversion-time profile for isothermal conditions. Also determine the heat exchange rate required to maintain isothermal conditions (Choose only X = 0.8). 4- The reaction is first-order, ireversible, liquid-phase, and exothermic. An incrt coolant i added to the reaction mixture to control the temperature. The temperature is kept constant by varying the flow rate of the coolant (see Figure 1). A-B Coolant C Mixture of A, B, and C Figure I. Semi-batch reactor with inert coolant stream. Calculate the flow rate of the coolant 2 h after the start of the reaction. Additional information: Temperature of reaction: 100 "F Value of k at 100 F: 1.2x10s Temperature of coolant: 80 F Heat capacity of all components: 0.5 Btu/lb. F Density of all components: 50 Ib/ft AHRy: - 25,000 Btu/lb-mol Initially: Vessel contains only A (no B or C present) CAD: 0.5 Ib-mol/t3 Initial volume: 50 ft

Introduction to Chemical Engineering Thermodynamics

8th Edition

ISBN:9781259696527

Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart

Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart

Chapter1: Introduction

Section: Chapter Questions

Problem 1.1P

See similar textbooks

Related questions

Question

i need the answer quickly

Transcribed Image Text:K/s 2_53078674550... -> +. Problems sheet No. 4 1- The gas phase reaction A - 3B is zero order, the initial calculation of A is 2 mol'dm' and the system contains 40 % inert. The reaction rate constant is 0.1 mol/dm3.min. Caleulate the time needed to achieve 80 % conversion, when the reaction is carried out in a batch гсаctor 2- A reaction A+BC which is first order with respect to each of the reactants with a reaction rate constant of 9.92 x 10 m'kmol.s at 25 °C. volume changes on reaction may be neglected. The reaction is carried out in a well-stirred isothermal batch reactor. Determine the reaction time necessary to achieve 95 % conversion of B using initial concentrations of 0.1 and 0.08 kmol/m' for A and B respectively. 3- A gas phase decomposition A→R+S is carried out in a batch reactor with initial conditions of To= 300 K, P, (total pressure) 5 atm and V = 0.5 m. The rate constant is k = 10"exp(-10000/T) h. The heat of reaction is -1500 kcal/kmol and the heat capacity of A, R and S are 30, 25 and 20 kcal/kmol.K respectively. Compute the conversion-time profile for isothermal conditions. Also determine the heat exchange rate required to maintain isothermal conditions (Choose only X = 0.8). 4- The reaction is first-order, irreversible, liquid-phase, and exothermic. An inert coolant is added to the reaction mixture to control the temperature. The temperature is kept constant by varying the flow rate of the coolant (see Figure 1). A-B Coolant C Mixture of A. B, and C Figure 1. Semi-batch reactor with inert coolant stream. Calculate the flow rate of the coolant 2 h after the start of the reaction. Additional information: Temperature of reaction: 100 "F Value of k at 100 °F: 1.2x10+s Temperature of coolant: 80 °F Heat capacity of all components: 0.5 Btu/lb. F Density of all components: 50 Ib/f AHg: - 25,000 Btu/lb - mol Initially: Vessel contains only A (no B or C present) CAD: 0.5 Ib-mol/ft3 Initial volume: 50 ft ne liquid-phase hydrolysis of dilute aqueous acetic anhydride solution is second order and irreversible, as indicated by the reaction (CH3C00),CO + H,0 - 2CH,COOH

Expert Solution

Trending now

This is a popular solution!

Step by step

Solved in 4 steps with 7 images

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, chemical-engineering and related others by exploring similar questions and additional content below.

Recommended textbooks for you

Introduction to Chemical Engineering Thermodynami…

Chemical Engineering

ISBN:

9781259696527

Author:

J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart

Publisher:

McGraw-Hill Education