Home Back

Latent Heat using Integrated Form of Clausius-Clapeyron Equation Calculator

Latent Heat Formula:

\[ LH = \frac{-\ln\left(\frac{P_f}{P_i}\right) \times R}{\left(\frac{1}{T_f} - \frac{1}{T_i}\right)} \]

Pa
Pa
K
K
J

Unit Converter ▲

Unit Converter ▼

From: To:

1. What is Latent Heat using Clausius-Clapeyron Equation?

Definition: This calculator determines the latent heat of vaporization or sublimation using the integrated form of the Clausius-Clapeyron equation.

Purpose: It's used in thermodynamics to calculate phase transition energies when direct measurement is difficult.

2. How Does the Calculator Work?

The calculator uses the formula:

\[ LH = \frac{-\ln\left(\frac{P_f}{P_i}\right) \times R}{\left(\frac{1}{T_f} - \frac{1}{T_i}\right)} \]

Where:

Explanation: The natural log of the pressure ratio is multiplied by the gas constant and divided by the difference in reciprocal temperatures.

3. Importance of Latent Heat Calculation

Details: Accurate latent heat values are crucial for designing heat exchangers, refrigeration systems, and understanding phase transitions.

4. Using the Calculator

Tips: Enter the initial and final pressures (in Pascals) and temperatures (in Kelvin). All values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What units should I use for input?
A: Pressure must be in Pascals (Pa) and temperature in Kelvin (K) for accurate results.

Q2: Can I use this for any phase transition?
A: Yes, it works for vaporization, sublimation, and other first-order phase transitions.

Q3: What assumptions does this calculation make?
A: It assumes ideal gas behavior and that latent heat is constant over the temperature range.

Q4: How accurate is this method?
A: It provides reasonable estimates but becomes less accurate over large temperature ranges.

Q5: What if I get a negative result?
A: Check your inputs - pressure and temperature must both increase or both decrease together.

Latent Heat Calculator© - All Rights Reserved 2025