Reduced Temperature Formula:
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Definition: Reduced temperature is the ratio of the actual temperature of a real gas to its critical temperature, providing a dimensionless parameter for thermodynamic calculations.
Purpose: It helps in the study of real gas behavior using corresponding states principle and is essential for Wohl's equation of state.
The calculator uses the formula:
Where:
Explanation: The formula relates the actual temperature to critical parameters through fundamental thermodynamic relationships.
Details: Reduced temperature is crucial for predicting gas behavior at different conditions and is fundamental to corresponding states theory.
Tips: Enter the actual gas temperature in Kelvin, critical pressure in Pascals, and critical molar volume in m³/mol. All values must be positive.
Q1: What is the physical significance of reduced temperature?
A: It indicates how far the temperature is from the critical point, helping predict phase behavior and thermodynamic properties.
Q2: What are typical values for reduced temperature?
A: Values below 1 indicate subcritical conditions, while values above 1 indicate supercritical conditions.
Q3: How accurate is Wohl's equation compared to other equations of state?
A: Wohl's equation is moderately accurate for simple molecules but less precise than modern equations like Peng-Robinson for complex molecules.
Q4: Where can I find critical parameters for different gases?
A: Critical parameters are available in thermodynamic databases and chemical engineering handbooks.
Q5: Why use Peng-Robinson critical parameters in Wohl's calculation?
A: The formula derivation connects these models, but you can use experimentally determined critical parameters as well.