Stoichiometric equations are used to represent growth of microorganisms provided a ' molecular formula' for the cells is available. The molecular formula for biomass is obtained by measuring the amounts of C, N, H, O and other elements in cells. For a particular bacterial strain, the molecular formula was determined to be C4.4H7.30 1.2N0.86 . These bacteria are grown under aerobic conditions with hexadecane (C16H34) as substrate. The reaction equation describing growth is:

                                    

Assuming 100% conversion, what is the yield of cells from oxygen in g g-l?

TLS Online TPP Program

#Question id: 15462

#Section 4: Fundamentals of Biological Engineering

What is the enthalpy of 150 g formic acid at 70°C and 1 atm relative to 25°C  and 1 atm? (Cp for formic acid is 0.524 cal g^-1 °C^-1)

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#Question id: 15463

#Section 4: Fundamentals of Biological Engineering

A system in which there is exchange of energy but not of mass, is called a/an    ______                 system

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#Question id: 15464

#Section 4: Fundamentals of Biological Engineering

The quantity of heat required to evaporate 1 kg of a saturated liquid is called

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#Question id: 15465

#Section 4: Fundamentals of Biological Engineering

50 g benzaldehyde vapour is condensed at 179°C. What is the enthalpy of the liquid relative to the vapour?  (Standard latent heat for vaporisation for benzaldehyde is 38.40 kJ gmol^-1)

TLS Online TPP Program

#Question id: 15466

#Section 4: Fundamentals of Biological Engineering

Water at 25°C enters an open heating tank at a rate of 10 kg h^-1. Liquid water leaves the tank at 88°C at a rate of 9 kg h^-1; 1 kg h^-1 water vapour is lost from the system through evaporation. At steady state, what is the rate of heat input to the system?

h (liquid water at 25°C = 104.8 kJ kg^-1) 

h (liquid water at 88°C = 368.5 kJ kg^-1) 

h (saturated steam at 88°C = 2656.9 kJ kg^-1)

TLS Online TPP Program

#Question id: 15467

#Section 4: Fundamentals of Biological Engineering

Fumaric acid is produced from Malic acid using Fumarase. Calculate standard heat of reaction for the following transformation:

C₄H₆O₅ → C₄H₄O₄ + H₂O

Given: (Δhc°)malic acid= -1328.8 kJ/gmol 

   (Δhc°)Fumaric acid= -1334.0 kJ/gmol