A gas compressibility factor is formulated as (where V1 = actual gas volume, V2 = volume estimated via ideal gas laws)____________________?
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Answer: A. V1/V2
Explanation
Compressibility factor is defined as actual molar volume divided by ideal gas molar volume. Ratio of real volume to ideal volume quantifies how much a gas deviates from ideal behavior. Dividing V1 by V2 provides the exact mathematical formulation for the gas compressibility factor Z. Real gases deviate from ideal behavior at high pressures and low temperatures due to molecular forces. Compressibility factor equals one for perfect ideal gases under all standard temperature and pressure conditions. Generalized compressibility charts plot Z values against reduced pressure and reduced temperature variables.
Natural gas pipeline transport requires accurate compressibility factors to calculate actual gas volume delivery. Chemical engineers use compressibility equations of state to design high pressure reactor vessels safely. Thermodynamic property estimations for industrial gases rely heavily on accurate compressibility factor data. Inverting the ratio places ideal volume on top which yields an inverse compressibility factor value. Subtracting volumes gives a volumetric difference rather than a dimensionless compressibility ratio. Multiplying actual and ideal volumes produces dimensionally incorrect units unrelated to compressibility.
- Subject
- Engineering
- Category
- Chemical Engineering
- Topic
- —
- Difficulty
- medium
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