Critical Molar Volume Formula:
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Definition: Critical molar volume is the volume occupied by gas at critical temperature and pressure per mole in the Peng-Robinson model.
Purpose: This calculation is essential in thermodynamics for predicting gas behavior under various conditions using the Peng-Robinson equation of state.
The calculator uses the formula:
Where:
Explanation: The formula relates actual and reduced parameters to determine the critical molar volume in the Peng-Robinson model.
Details: Accurate calculation of critical molar volume is crucial for designing chemical processes, predicting phase behavior, and modeling thermodynamic properties of real gases.
Tips: Enter the temperature of real gas in Kelvin, reduced temperature, gas pressure in Pascals, and reduced pressure. All values must be > 0.
Q1: What is reduced temperature?
A: Reduced temperature is the ratio of the actual temperature to the critical temperature of the substance.
Q2: What is reduced pressure?
A: Reduced pressure is the ratio of the actual pressure to the critical pressure of the substance.
Q3: Why is the universal gas constant used?
A: The universal gas constant provides the necessary proportionality between thermodynamic quantities in the equation.
Q4: What are typical values for reduced parameters?
A: Reduced parameters are typically between 0 and 1 for subcritical conditions, but can exceed 1 for supercritical conditions.
Q5: How accurate is this calculation?
A: This provides a theoretical value based on the Peng-Robinson model. Actual values may vary depending on the specific gas and conditions.