Pressure of Gas Formula:
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Definition: This calculator determines the pressure of a real gas using the compressibility factor, temperature, and molar volume.
Purpose: It helps in understanding the behavior of real gases which deviate from ideal gas behavior, especially at high pressures or low temperatures.
The calculator uses the formula:
Where:
Explanation: The compressibility factor accounts for the deviation from ideal gas behavior, modifying the ideal gas law to apply to real gases.
Details: The compressibility factor (z) indicates how much a real gas deviates from ideal gas behavior. At z=1, the gas behaves ideally.
Tips: Enter the compressibility factor, temperature in Kelvin, and molar volume in cubic meters. All values must be > 0.
Q1: What is a typical compressibility factor range?
A: For most gases, z ranges from 0.7 to 1.2 under normal conditions, but can vary significantly at extreme pressures/temperatures.
Q2: How do I find the compressibility factor?
A: It can be determined experimentally or from compressibility charts using reduced pressure and temperature.
Q3: Why use this instead of ideal gas law?
A: This provides more accurate results for real gases, especially at high pressures (>10 bar) or low temperatures.
Q4: What units should I use?
A: Temperature must be in Kelvin, molar volume in cubic meters, and the result is in Pascals.
Q5: What's the universal gas constant value?
A: R = 8.31446261815324 J/(mol·K) is used in this calculation.