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Definition: The Specific Latent Heat is energy released or absorbed, by a body or a thermodynamic system, during a constant-temperature process.
Purpose: This calculator helps determine the latent heat of evaporation for water near standard temperature and pressure conditions.
The calculator uses the formula:
Where:
Explanation: The formula relates the slope of the vapor pressure curve to the latent heat of vaporization.
Details: Understanding latent heat is crucial for thermodynamics, meteorology, and engineering applications involving phase changes.
Tips: Enter the slope of the coexistence curve (typically around 50 Pa/K for water near STP), temperature in Kelvin, and saturation vapor pressure in Pascals.
Q1: What is a typical value for the slope of the coexistence curve?
A: For water near standard conditions, it's approximately 50 Pa/K, but varies with temperature.
Q2: Why is temperature squared in the formula?
A: The squared term comes from the Clausius-Clapeyron relation which this formula is derived from.
Q3: How accurate is this calculation?
A: It provides good estimates near standard conditions but becomes less accurate at extreme temperatures.
Q4: Where can I find saturation vapor pressure values?
A: Use thermodynamic tables or the Antoine equation to calculate saturation vapor pressure.
Q5: What are common applications of this calculation?
A: Used in designing heat exchangers, understanding atmospheric processes, and energy calculations in phase-change systems.