Recommendations

Pressure drop in Leopold blocks Circular weir Atmospheric pressure given altitude Globe valve Dynamic viscosity of atmospheric air Hayduk and Laudie's equation

Wilke and Chang's equation

Input data

Temperature

Solution viscosity

Molar mass of solvent

Molar volume

Output data

Description

The Wilke and Chang equation is best used for dilute non-electrolyte solutions (concentration close to 1%).

Atomic volume table

Element	Atomic Volume (cm³/gmol)
Bromine	27.0
Carbon	14.8
Chlorine	21.6
Hydrogen	3.7
Iodine	37.0
Nitrogen, double bond	15.6
Nitrogen, in primary amines	10.5
Sulphur	25.6
Nitrogen, in secondary amines	12.0
Oxygen, except as noted below	7.4
Oxygen, in methyl esters	9.1
Oxygen, in methyl ethers	9.9
Oxygen, in higher chain ethers and other esters	11.0
Oxygen, in acids	12.0

Molecular volume table

Compost	Molecular Volume, Va (cm³/gmol)
Hydrogen, H2	14.3
Nitric oxide, NO	23.6
Oxygen, O2	25.6
Nitrous oxide, N20	36.4
Nitrogen, N2	31.2
Ammonia, NH3	25.8
Air	29.9
Water, H20	18.9
Carbon monoxide, CO	30.7
Hydrogen sulfide, H2S	32.9
Carbon dioxide, CO2	34.0
Bromine, Br2	53.2
Carbonyl sulfide, COS	51.5
Chlorine, Cl2	48.4
Sulfur dioxide, SO2	44.8
Iodine, I2	71.5

Table of commonly used values

Solvent	Parameter - Φb
Water	2.26
Methanol	1.9
Ethanol	1.5
Non-polar solvents	1

Description

The Wilke and Chang equation is best used for dilute non-electrolyte solutions (concentration close to 1%).

Atomic volume table

Element	Atomic Volume (cm³/gmol)
Bromine	27.0
Carbon	14.8
Chlorine	21.6
Hydrogen	3.7
Iodine	37.0
Nitrogen, double bond	15.6
Nitrogen, in primary amines	10.5
Sulphur	25.6
Nitrogen, in secondary amines	12.0
Oxygen, except as noted below	7.4
Oxygen, in methyl esters	9.1
Oxygen, in methyl ethers	9.9
Oxygen, in higher chain ethers and other esters	11.0
Oxygen, in acids	12.0

Molecular volume table

Compost	Molecular Volume, Va (cm³/gmol)
Hydrogen, H2	14.3
Nitric oxide, NO	23.6
Oxygen, O2	25.6
Nitrous oxide, N20	36.4
Nitrogen, N2	31.2
Ammonia, NH3	25.8
Air	29.9
Water, H20	18.9
Carbon monoxide, CO	30.7
Hydrogen sulfide, H2S	32.9
Carbon dioxide, CO2	34.0
Bromine, Br2	53.2
Carbonyl sulfide, COS	51.5
Chlorine, Cl2	48.4
Sulfur dioxide, SO2	44.8
Iodine, I2	71.5

Table of commonly used values

Solvent	Parameter - Φb
Water	2.26
Methanol	1.9
Ethanol	1.5
Non-polar solvents	1

References

WELTY, James; WICKS, Charles E.; WILSON, Robert E.; RORRER, Gregory L. Fundamentals of Momentum, Heat and Mass Transfer. 5th Ed. John Wiley & Sons, 2008.