Answer to Question #224555 in Chemical Engineering for Rati

Question #224555
Write basis for calculation
1
Expert's answer
2021-08-09T08:04:48-0400

Step 1

A basis is a reference that is chosen for a calculation in which it is plan to make in a particular problem. A proper choice of basis often helps in making a problem much easier to solve than a bad choice.


Step 2

A) Since the total weight of the mixture of gases is given in kilograms, it is convenient to choose a basis of 1 or moles of the gases. If SI units are used moles can also be choose as a basis to calculate the average molecular mass of the gas"."


Step 3

b) Since the total weight of the mixture of gases with various compositions is given in terms of pound mass, it is convenient to choose a basis of 1 or moles of the gases. If SI units are used moles can also be choose as a basis to calculate the average molecular mass and mass fraction of each components in the mixture.


Step 4

c) Since coal is a solid, a basis based on mass would be convenient to use in determining the composition of the volatile combustion material (VCM) of each element. So, 1 or of coal, or 1 or of coal can be used as a basis in the calculation of VCM composition of each element.


Step 5

d) Since calculations involving gases are best done on in terms of moles, a basis of 1 or 100 moles (SI or AE) can be used as a convenient basis in the analysis of the mass percentage of the fuel gas.


Step 6

e) Since calculations involving gases are best done on in terms of moles, a basis of 1 or 100 moles (SI or AE) can be used as a convenient basis in determining the molecular weight and average molecular weight of the components in the gas mixture.


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