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: 14285

#Section 5: Bioprocess Engineering and Process Biotechnology

Match the transport process with appropriate time constants given below 

Transport Process	Time Constants
1. Oxygen transfer	p. V/Q
2. Heat transfer	q. 4V(1.5ND3)
3. Flow	r. VpCp/UA
4. Mixing	s. 1/KLa

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#Question id: 14286

#Section 5: Bioprocess Engineering and Process Biotechnology

 When a liquid of density 1200kg/m3 and viscosity 0.01 kg m^-1s^-1 flows through a 1 cm ID pipe at 0.2m/s, the flow is referred as a 

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#Question id: 14287

#Section 5: Bioprocess Engineering and Process Biotechnology

A chemostat is run with a feed rate of llitre/h when the volume of the reactor is also 1 litre. At steady state the doubling time of the cells in the chemostat is.....   h. 

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#Question id: 14288

#Section 5: Bioprocess Engineering and Process Biotechnology

During a batch culture experiment the following data was obtained 

What will be the product yield (g) per gram of substrates?

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#Question id: 14289

#Section 5: Bioprocess Engineering and Process Biotechnology

In a fermenter the impeller diameter is increased from 0.5m to 1m and the rpm is increased from 100 rpm to 400 rpm. Reynolds number will increase by?

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#Question id: 14290

#Section 5: Bioprocess Engineering and Process Biotechnology

Acetobacter aceti converts alcohol to acetic acid according to the schiometric relation

In a vigorously agitated and aerated reactor containing 20 g/l ethanol, the organism produces 16g/l acetic acid and 2g/l was the residual ethanol concentration what are the theoretical and observed yields of acetic acid expressed in g/g ethanol