Question

Which one is having the lowest value of diffusivity?

a.

Acetic acid

b.

Oxygen

c.

Benzene

d.

Toluene

Posted under Mass Transfer

Answer: (d).Toluene

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Q. Which one is having the lowest value of diffusivity?

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Q. Assume the following thermos-physical properties of air

D = 0.256 * 10⁻⁴ m²/s
µ = 1.86 * 10⁻⁵ kg/m s
cₚ = 1.005 k J/kg degree Celsius
pᵣ = 0.701
p =1.165 kg/m³

Find the value of Schmidt number.

Q. Air at 30 degree Celsius temperature flows at 45 m/s past a wet flat plate of length 0.5 m. Estimate the value of mass transfer coefficient. Assume that the water vapor content of air initially is negligible and take the following thermos-physical properties of air.

D = 0.256 * 10⁻⁴ m²/s
µ = 1.86 * 10⁻⁵ kg/m s
cₚ = 1.005 k J/kg degree Celsius
pᵣ = 0.701
p =1.165 kg/m³

Q. Air at 30 degree Celsius temperature flows at 45 m/s past a wet flat plate of length 0.5 m. Estimate the value of Reynolds number. Assume that the water vapor content of air initially is negligible and take the following thermos-physical properties of air.

D = 0.256 * 10⁻⁴ m²/s
µ = 1.86 * 10⁻⁵ kg/m s
cₚ = 1.005 k J/kg degree Celsius
pᵣ = 0.701
p =1.165 kg/m³

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D =0.82 * 10⁻⁶ m²/s
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