Chemical Engineering Fundamentals II — Summer 2025

Discuss space time, space velocity and holding time.

Discuss the different ways in which rate of reaction can be defined.

Explain classification of mass transfer operations with examples of each.

Define molecular and eddy diffusion with examples.

Liquid Adecomposes by first order kinetics, and in a batch reactor 50% of Ais converted in 5 minutes. How long will it take to reach 75% conversion?

Discuss the integral and differential method for the analysis of kinetic data.

Discuss the analysis of total pressure data obtained in a constant volume system and derive the relation used to calculate the partial pressure of gaseous component in reaction mixture.

Explain Fick’s law in diffusion through solids.

Explain various ideal reactors with their characteristics.

Determine the activation energy and frequency factor from the following data for the bimolecular formation of methyl ethyl ether. Also find the rate equation. Temperature, oC 0 6 12 18 24 30 k x 105, lit/(gmol.sec) 5.6 11.8 24.5 48.8 100 208

Explain concept of effective diffusivity for multicomponent mixtures.

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

Discuss the system of three liquids – one pair partially soluble on ternary equilibria for liquid extraction.

Discuss different types of equilibrium diagram for leaching.

Explain liquid-liquid extraction, extract phase, raffinate phase, and tie line.

Describe “two resistance theory” of interphase mass transfer in brief.

Define Ftype and k type mass transfer coefficients.

Discuss types of random packing with figures.

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

Briefly describe about estimation of diffusivity of liquids.

Pyrolysis of ethane proceeds with an activation energy of 70000 calories. How much faster is the decomposition at 650 oC than at 500 oC?

Explain recycle ratio and derive the performance equation of recycle plug flow reactors.1

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

Explain the preparation of solids for leaching.

State different theories explaining the meaning of mass transfer coefficients. Explain any one of them in detail.