Engineering Answers

For, A→ R, liquid phase reaction carried out in a 1000 liter MFR with CAo=10 mol/lit, v=10 lit/min, -rA = 0.09 mol .lit¹.min¹ ,what is the exit concentration of A (mol/liter)?

A)1

B)3

C)5

D)7

For 2A→R , with pure gas A as feed to a PFR ,what is εA=?

A)-0.5

B)0.5

C)2

D)-2

For a liquid phase reaction ,2A+B→R. Take CRo=0 and CAo=CBo., if the conversation of A is 80% then what is the conversion of B?_____________________

A)80%

B)40%

C)60%

D)50%

14)An aqueous feed containing reactant A with concentration of 5 mol/lit is taken in a batch reactor. The reaction is first order with rate constant of 0.5 min¹. What is the concentration (in mol/lit) at end of 5 min? A) 4.1

B) 0.41

C) 0.082

D)3

13)An aqueous feed containing reactant A with concentration of 1 mol/lit is taken in a batch reactor. The reaction is first order

rate constant of 0.5min^{1}

What is the time (in min)

required for 90% conversion?

A) 2.3

B) 4.6

C)2.0

D)4.0

12)What is the best arrangement of reactors: PFR, small MFR and large MFR, for reaction orders n>1?_____________

Consider an elementary aqueous reversible reaction system, A↔︎B. The equilibrium constant at 62°C is 11.5. What is the equilibrium conversions at temperature 62°C ?______________

10)In case of endothermic reversible reactions, equilibrium conversion_____________(decreases ,increases) as the temperature increased?

The thermodynamic (reaction) equilibrium constant is function of ______________ (temperature only/pressure only/both temperature and pressure)?

Refrigerant-134a is to be cooled by water in a condenser. The refrigerant enters the condenser with a mass flow rate of 6 kg/min at 1 MPa and 70ºC and leaves at 35°C. The cooling water enters at 300 kPa and 15°C and leaves at 25ºC. Neglecting any pressure drops, determine (a) the mass flow rate of the cooling water required and (b) the heat transfer rate from the refrigerant to water