Critical Molar Volume Formula:
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Definition: The critical molar volume is the volume occupied by one mole of gas at critical temperature and pressure according to Wohl's real gas model.
Purpose: This calculator determines the critical molar volume using actual and reduced parameters of temperature and pressure.
The calculator uses the formula:
Where:
Explanation: The formula relates the actual and reduced parameters to calculate the critical volume using Wohl's model.
Details: Critical properties are essential for understanding gas behavior near critical points and for designing chemical processes.
Tips: Enter the actual temperature (K), reduced temperature, actual pressure (Pa), and reduced pressure. All values must be > 0.
Q1: What is reduced temperature and pressure?
A: Reduced parameters are the ratio of actual values to critical values (T_r = T/T_c, P_r = P/P_c).
Q2: Why use Wohl's model?
A: Wohl's equation provides a more accurate description of real gas behavior than ideal gas law.
Q3: What are typical units for critical molar volume?
A: The standard unit is cubic meters per mole (m³/mol), often expressed in liters for practical use.
Q4: How accurate is this calculation?
A: Accuracy depends on the precision of input parameters and the applicability of Wohl's model to your specific gas.
Q5: Can I use this for any gas?
A: Yes, but results are most accurate for gases where Wohl's model is appropriate (non-polar or slightly polar gases).