Pressure of Gas Formula:
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Definition: This calculator computes the actual pressure of a real gas using the reduced Wohl equation, given reduced parameters and critical pressure.
Purpose: It helps chemical engineers and researchers determine gas pressure under non-ideal conditions using reduced state parameters.
The calculator uses the formula:
Where:
Explanation: The formula accounts for deviations from ideal gas behavior using reduced parameters that relate actual conditions to critical conditions.
Details: Accurate pressure calculation is essential for designing chemical processes, predicting phase behavior, and ensuring safety in high-pressure systems.
Tips: Enter the critical pressure, reduced temperature, and reduced molar volume. All values must be positive numbers.
Q1: What is reduced temperature?
A: Reduced temperature is the ratio of the actual temperature to the critical temperature (T/Tc).
Q2: How is reduced molar volume defined?
A: Reduced molar volume is the ratio of the actual molar volume to the critical molar volume (V/Vc).
Q3: When would I use this calculation?
A: When working with real gases at high pressures or near critical conditions where ideal gas law fails.
Q4: What are typical units for critical pressure?
A: Pascals (Pa) are standard, though atmospheres (atm) or bars may also be used with conversion.
Q5: How accurate is this equation?
A: The Wohl equation provides reasonable estimates for many real gases, though more complex equations may be needed for precise work.