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What is the Difference between diffusivity and mass transfer coefficient?
The rate of transfer of a process is equal to the driving force divided by the resistance.The mass transfer coefficient is the resistance to mass transfer. In mass transfer the driving force is the concentration gradient. The mass transfer coefficient is considered anything that contributes to resistance to mass transfer: thermal and eddy diffusivity, distance, etc.Fick's law of diffusion describes convective mass transfer as:N=-c*D*(ca2-ca1)/(z2-z1)where:-c is some constant multiplier (unitless)-The quantity (z2-z1) is the distance between two points. (length i.e. meters)-D is the mass diffusivity or the diffusion coefficient and is dependent on properties of the substance (such as particle size etc.) and temperature. (units: length2/time i.e. m2/s)-The quantity (ca2-ca1) is the concentration gradient between the same two points (the driving force) (units: amount/length3 i.e. mol/m3)-N is the rate of mass transfer (units: mass/(length2*time) i.e. mol/m2*s) )Putting Fick's law in terms of the mass transfer coefficient kc', yields:N=-kc'*(ca2-ca1)where kc'= -c*D/(z2-z1).You can see that the mass transfer coefficient is in fact a function of the diffusivity.
What order are medals on dress blue alpha?
Refer to your MOL account. While viewing your awards there will be a link to show by order of precedence
What is the molar mass of copper 2?
The molar mass of copper is approximately 63.55 g/mol. This value corresponds to the average atomic mass of copper taking into account the isotopic abundances of its different isotopes.
How many gram of water is equal to 2.2 mol of water?
2.2 mol water = 2.2 (mol) * 18 (g/mol) water = 39.6 (mol*g/mol) = 40 g18 g/mol = mol mass of H2O = 2*H + 1*O = (2*1 + 16) g/mol
What has the author Leo Mol written?
Leo Mol has written: 'Leo Mol'
What is -1211.5 joules per kelvin converted to kilijoules per moles?
These are not compatible. The first is Energy per Temperature. The second is Energy per amount of matter.
How many grams of NO are produced from the reaction of 2 mol of N2 with 2 mol of O2?
You have :N2 + O2 -----> 2NOmoles NO = ( 2 mols N2 reacted ) ( 2 mol NO / mol N2 reacted )moles NO = 4 moles NOmass NO = ( 4 mol NO ) ( 30 g NO / mol NO ) = 120 g NO
How much octane can react with 0.740 of oxygen?
1 mol of octane (C8H18) reacts with 25 mol of oxygen (O2) to produce 8 mol of CO2 and 9 mol of H2O. Therefore, 0.74 mol of oxygen can react with 0.0744 mol of octane.
How many mol of H are in 4.51 mol H2O?
In 1 molecule of H2O, there are 2 atoms of H. Therefore, in 1 mol of H2O, there are 2 mol of H. So, in 4.51 mol of H2O, there would be 4.51 * 2 = 9.02 mol of H.
How many mmol are in 3.5 mol?
There are 3500 mmol in 3.5 mol. To convert mol to mmol, you multiply by 1000 since there are 1000 mmol in 1 mol.
Determine the empirical formula what compound if a sample contains 0.104 mol K 0.052 mol C and 0.156 mol O?
To find the empirical formula, we need to determine the ratio of each element in the compound. First, find the moles of each element: K = 0.104 mol C = 0.052 mol O = 0.156 mol Next, divide each mole value by the smallest mole value to get the ratio: K = 0.104 mol / 0.052 mol = 2 C = 0.052 mol / 0.052 mol = 1 O = 0.156 mol / 0.052 mol = 3 Therefore, the empirical formula is K2CO3.
What is the mole fraction of He in a gaseous solution containing 4.0 g of He 6.5 g of Ar and 10.0 g of Ne?
First, calculate the moles of each gas using their molar masses: He (4.0 g / 4.0 g/mol = 1.0 mol), Ar (6.5 g / 39.9 g/mol = 0.163 mol), Ne (10.0 g / 20.2 g/mol = 0.495 mol). Then, calculate the total moles of gas in the solution: 1.0 mol + 0.163 mol + 0.495 mol = 1.658 mol. Finally, find the mole fraction of He by dividing the moles of He by the total moles of gas: 1.0 mol / 1.658 mol ≈ 0.602.
