MihsabaHow to use
During a phase change, energy can transfer without temperature change in the ideal model. Q=mL links energy, mass and specific latent heat.
- Choose Q, m or L as unknown.
- Enter the two known values.
- Calculate the consistent set.
How it is calculated
Q=mL
Example
Example: L=334000 J/kg and m=1 kg gives Q=334000 J.
Important notes
L depends on material, phase transition and conditions; use an appropriate trusted value for the material.
Frequently asked questions
Does Q=mL include heating before melting?
No; sensible heating needs mcΔT separately.
Unit of L?
Usually J/kg.
Can Q be negative?
Sign depends on convention; this calculator uses magnitudes.