Critical Pressure of Real Gas given Wohl Parameter a, and other Actual and Reduced Parameters Calculator

Critical Pressure Formula:

\[ P_c = \frac{a}{6 \times \left(\frac{T_{rg}}{T_r}\right) \times \left(\left(\frac{V'_m}{V'_r}\right)^2\right)} \]

Wohl Parameter a:

Temperature of Real Gas:

Reduced Temperature:

Molar Volume of Real Gas:

m³

Reduced Molar Volume:

m³

Critical Pressure (Pa):

Definition: Critical pressure is the minimum pressure required to liquify a substance at its critical temperature.

Purpose: This calculator determines the critical pressure using the Wohl parameter and other actual and reduced parameters.

The calculator uses the formula:

\[ P_c = \frac{a}{6 \times \left(\frac{T_{rg}}{T_r}\right) \times \left(\left(\frac{V'_m}{V'_r}\right)^2\right)} \]

Where:

Explanation: The formula relates the Wohl parameter to critical pressure through temperature and volume ratios.

Details: Critical pressure is essential for understanding phase behavior and designing processes involving real gases.

Tips: Enter Wohl parameter a, temperature of real gas, reduced temperature, molar volume, and reduced molar volume. All values must be > 0.

Q1: What is the Wohl parameter a?
A: It's an empirical parameter characteristic to equation obtained from Wohl model of real gas.

Q2: What are reduced parameters?
A: Reduced parameters are ratios of actual parameters to their critical values.

Q3: Why is critical pressure important?
A: It helps determine conditions needed for gas liquefaction and phase transitions.

Q4: What units should I use?
A: Use Kelvin for temperature, cubic meters for volume, and the calculator will output pressure in Pascals.

Q5: Can this be used for all gases?
A: The Wohl model works best for non-polar or slightly polar gases.