Fluids Evaporation Latent Heat

Overview

Engineering reference data for Fluids Evaporation Latent Heat in thermodynamics.

Key Formulas

First Law

$\Delta U = Q - W$

Energy is conserved — heat added minus work done.

Ideal Gas Law

$PV = nRT$

Relates pressure, volume, and temperature of an ideal gas.

Heat Transfer

$Q = mc\Delta T$

Sensible heat transfer.

Carnot Efficiency

$\eta = 1 - T_C/T_H$

Maximum efficiency between two temperatures.

Variables

Evaporation Heat Calculation

The total heat required to evaporate a given mass of fluid is calculated using: $q = h_e \cdot m$ where $q$ is the evaporation heat (kJ or Btu), $h_e$ is the specific latent heat of evaporation (kJ/kg or Btu/lb), and $m$ is the mass of the liquid (kg or lb).

Example: For 10 kg of water with $h_e = 2256 \text{ kJ/kg}$: $q = (2256 \text{ kJ/kg}) \cdot (10 \text{ kg}) = 22560 \text{ kJ}$

Interactive Charts

References

• Original Source