Formula Used:
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Definition: Reduced molar volume is a dimensionless quantity derived from the actual molar volume of a real gas using Wohl's equation of state, which accounts for deviations from ideal gas behavior.
Purpose: It helps in comparing the properties of different gases at corresponding states and is particularly useful in thermodynamic calculations for real gases.
The calculator uses the formula:
Where:
Explanation: The formula relates the actual molar volume to reduced parameters through Wohl's equation of state, which accounts for molecular interactions in real gases.
Details: Calculating reduced properties allows for the application of the principle of corresponding states, enabling predictions of gas behavior under various conditions.
Tips: Enter the molar volume of real gas in cubic meters, temperature in Kelvin, reduced temperature (dimensionless), pressure in Pascals, and reduced pressure (dimensionless). All values must be > 0.
Q1: What is the significance of reduced parameters?
A: Reduced parameters allow comparison of different gases at the same relative conditions (relative to their critical points).
Q2: How do I obtain reduced temperature and pressure?
A: Reduced temperature is actual temperature divided by critical temperature. Reduced pressure is actual pressure divided by critical pressure.
Q3: What's the range for reduced molar volume?
A: It typically ranges between 0 and 1, where 1 represents the critical point.
Q4: How does Wohl's equation differ from van der Waals?
A: Wohl's equation includes additional terms to better account for molecular interactions, making it more accurate for certain conditions.
Q5: When would I need this calculation?
A: When working with real gases at high pressures or low temperatures where ideal gas law assumptions break down.