Critical Temperature Formula:
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Definition: Critical Temperature is the highest temperature at which the substance can exist as a liquid. At this phase boundaries vanish, and the substance can exist both as a liquid and vapor.
Purpose: This calculator determines the critical temperature using the Redlich-Kwong equation parameter 'a' and critical pressure.
The calculator uses the formula:
Where:
Explanation: The formula relates the critical temperature to the Redlich-Kwong parameter 'a' and critical pressure through a derived relationship.
Details: Critical temperature is essential for understanding phase behavior, designing chemical processes, and predicting gas liquefaction conditions.
Tips: Enter the Redlich-Kwong parameter 'a' and critical pressure in Pascals. All values must be positive numbers.
Q1: What is the Redlich-Kwong parameter 'a'?
A: It's an empirical parameter characteristic to the Redlich-Kwong equation of state for real gases.
Q2: What units should I use for critical pressure?
A: The calculator expects Pascals (Pa) as the input unit for critical pressure.
Q3: How accurate is this calculation?
A: It provides a theoretical estimate based on the Redlich-Kwong equation. Actual values may vary for specific substances.
Q4: Can I use this for any gas?
A: Yes, but accuracy depends on how well the Redlich-Kwong equation models the particular gas.
Q5: What's the significance of the 0.42748 constant?
A: It's a derived constant that appears in the relationship between critical parameters and Redlich-Kwong coefficients.