Slope of Coexistence Curve Formula:
From: | To: |
Definition: The slope of the coexistence curve from the Clausius-Clapeyron equation (dP/dT) is the slope of the tangent to the coexistence curve at any point.
Purpose: It describes how the pressure changes with temperature along the phase boundary between two phases of matter.
The calculator uses the formula:
Where:
Explanation: The slope is calculated by multiplying the specific latent heat by molecular weight, then dividing by the product of temperature and volume change.
Details: Understanding the slope helps predict phase transitions and is crucial in thermodynamics, meteorology, and materials science.
Tips: Enter the specific latent heat in J/kg, molecular weight in kg, temperature in K, and volume change in m³. All values must be > 0.
Q1: What is specific latent heat?
A: It's the energy released or absorbed during a phase transition at constant temperature per unit mass.
Q2: Why is molecular weight important?
A: It accounts for the mass of the molecules undergoing the phase transition.
Q3: What does a steeper slope indicate?
A: A steeper slope means pressure changes more dramatically with temperature along the phase boundary.
Q4: Can this be used for all phase transitions?
A: Yes, it applies to any first-order phase transition (liquid-gas, solid-liquid, etc.).
Q5: What are typical units for the result?
A: The slope is typically expressed in Pascals per Kelvin (Pa/K).