Latent Heat
Compute heat Q absorbed/released in a phase change from mass m and latent heat L.
Inputs
Formula
Q = m·L
Latent heat of melting/boiling dwarfs sensible heating.
Fundamentals
Compute heat Q absorbed/released in a phase change from mass m and latent heat L.
This tool computes Latent Heat from the formula: Q = m·L
History
Fluid mechanics and heat transfer were established in the 18th–19th centuries with steam engines and thermodynamics.
Engineering applications
Used for piping, heat-exchange and hydraulic system estimates.
Glossary
| Mass m | Input parameter |
| Latent heat L | Input parameter |
| Heat Q | Output result |
How to use
- Fill in Mass m, Latent heat L in the Inputs section (watch the unit on each field).
- Click Calculate; the tool evaluates the formula shown above.
- Read Heat Q in the results area.
Formula · Worked Example · Knowledge
Formula
核心计算关系：Q = m·L
输入变量：
- Mass m
m— kg - Latent heat L
L— kJ/kg
输出结果：
- Heat Q
Q— kJ
假设/适用：Flow formulas assume steady, incompressible, continuous flow; correct for compressible/high-speed.
Worked Example
根据公式 Q = m·L，取 Mass m = 1 kg；Latent heat L = 334 kJ/kg。
代入计算得：Heat Q = 334 kJ。
Key Points
- Flow formulas assume steady, incompressible, continuous flow; correct for compressible/high-speed.
- Reynolds Re sets laminar/turbulent; friction f depends on regime & roughness.
- Energy eqn includes elevation, pressure and velocity heads; keep units as length.
Parameters
Inputs
| Parameter | Symbol | Unit | Default |
|---|---|---|---|
| Mass m (kg) | m | kg | 1 |
| Latent heat L (kJ/kg) | L | kJ/kg | 334 |
Outputs
| Result | Symbol | Unit |
|---|---|---|
| Heat Q | Q | kJ |
Applications
- Pipe flow rate and pressure drop
- Hydraulic cylinder force/speed design
- Flow-meter selection and calibration
FAQ
What formula does this tool use?
This tool computes per ISO / AGMA / ASME standard formulas: Q = m·L
How accurate are the results?
Results match input precision, based on SI units and common engineering approximations; for critical duty re-check with a safety factor.
Where is it used?
Pipe flow rate and pressure drop