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Stoichiometry

Stoichiometry
Cp - Cv, for an ideal gas is equal to

R
3R
R/2
2R

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Stoichiometry
The maximum adiabatic flame temperature of fuels in air is __________ the maximum flame temperature in pure oxygen.

Same as
Lower than
Higher than
Not related to

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Stoichiometry
The value of the gas-law constant 'R' is 1.987

Kcal/kg-mole.°C
Both B & C
Kcal/kg-mole.°K
Btu/lb-mole.°R

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Stoichiometry
A chemical process is said to occur under unsteady state, if the

Ratio of streams entering/leaving are independent of time
Inventory changes do not take place
None of these
Flow rates & composition both are time dependent

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Stoichiometry
Average molecular weight of air is about

79
21
29
23

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Stoichiometry
Pure aniline is evaporating through a stagnant air film of 1 mm thickness at 300 K and a total pressure of 100 KPa. The vapor pressure of aniline at 300 K is 0.1 KPa. The total molar concentration under these conditions is 40.1 mole/m³ . The diffusivity of aniline in air is 0.74xl0-5m²/s.The numerical value of mass transfer co-efficient is 7.4 x 10-3. Its units are

Cm/s
Kmole/m².s.Pa
Mole/m².s.Pa
M/s

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