Description
Return a component's mole fraction.
A process stream can be described on mass, mole, phase or solvent bases, which are not interchangeable. Lever rules, partition factors and operating-line terms assume compatible composition definitions and an appropriate physical model; a local balance does not determine equilibrium properties or a complete separation design.
Return a component's mole fraction.
When to use this tool
Use Stream Component Mole Share when checking the stated stream composition, phase or separation-model term.
How to use the tool and how it works
- Enter componentMoles, totalMoles. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read moleFraction. Use the output convention below.
Return a component's mole fraction. Require totalMoles > 0 and componentMoles in [0,total]; moleFraction = component/total.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| componentMoles | Component Moles | Required. Finite number; minimum 0. |
| totalMoles | Total Moles | Required. Finite number; strictly above 0. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| moleFraction | Mole Fraction | Required. Finite number. |
{
"input": {
"componentMoles": 2,
"totalMoles": 8
},
"output": {
"moleFraction": 0.25
}
}Limitations and assumptions
- Both amounts use matching mole units; this does not determine composition, phase state or a mixture property.
- Inputs must satisfy both the field types and the cross-field conditions above. Invalid input causes an error; a successful false flag or documented placeholder is a different result.
- Numeric calculations use binary floating point unless exact decimal-integer arithmetic is explicitly stated. No hidden measurement tolerance or decimal rounding is added; nonfinite or out-of-contract results are rejected. Numeric signed-zero results are exported as zero.
Alternative or Complementary methods
Use verified equilibrium and material-property data on consistent bases and solve the complete process model for actual separation or equipment decisions.
References
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