Chemical Engineering Fundamentals II — Winter 2021

Write about estimation of diffusivity of liquids.

Explain criteria of solvent selection for gas absorption.

Which are different theories explaining the meaning of mass transfer coefficients? Explain Film theory in detail.

Define the following terms:

order of reaction ii) elementary and non-elementary reactions

Derive the performance equation of a mixed flow reactor.

Write a short note on differential method and integral method of analysis of kinetic data.

Explain ideal and non-ideal solutions.

Explain the classification of reaction in details with examples.

State Fick’s first law of diffusion and explain flux Nand J A A.

Explain gas phase controlled and liquid phase controlled mass transfer operations with the help of two-resistance theory of interphase mass transfer.

Discuss temperature dependency of activation energy using Arrhenius theory.

State common principles of equilibrium in case of interphase mass transfer.

Explain classification of mass transfer operations with examples of each.

Define Ftype and k type mass transfer coefficients.

Derive performance equation for a PFR.

The rate constant of a reaction is measured at different temperatures is reported below. Calculate the activation energy for this reaction. Temperature, K 273 293 303 313 Rate constant, k, 2.46 x 105 47.5 x 105 576 x 105 5480 x 105 sec-1

Explain concept of effective diffusivity for multicomponent mixtures.

Compare momentum, heat and mass transfer.

Explain preparation of solids for leaching.

Mention different types of solid diffusion.

Define the terms: liquid extraction, extract, raffinate and solvent.07

In an O – Ngas mixture at 1 atm pressure and 250C, the concentration of Oxygen at22 two planes 2 mm apart are 10 and 20 volume% respectively. Calculate flux of diffusion of O 2 for the case where N 2 is non-diffusing. D = 2.065 x 10-5 m2/s. O2N2

Discuss parallel reactions with examples. Also discuss selectivity for parallel reaction.

Write a short note on variable volume batch reactor.

For a given liquid flow rate, give step wise procedure to calculate minimum liquid to gas ratio for absorbers.