Calculateur de Chaleur de Fusion Gratuit

Calculez l'énergie nécessaire pour la fusion d'une substance. Déterminez la chaleur latente pour le changement d'état.

kg
J/kg

Heat Energy Required

334,000 J

Heat Energy (kJ)334.00 kJ

Heat Energy Required vs Mass

Formule

Heat of Fusion

The heat of fusion is the energy absorbed during melting at constant temperature.

Formula

Q = m * L_f

where L_f is the specific latent heat of fusion. For water/ice, L_f = 334,000 J/kg = 334 kJ/kg.

Exemple Résolu

Melting 1 kg of ice at 0°C.

  1. 01Q = m * Lf
  2. 02Q = 1 * 334000
  3. 03Q = 334,000 J = 334 kJ

Questions Fréquentes

Does temperature change during melting?

No. During a phase change, all added energy goes into breaking intermolecular bonds, not raising temperature.

What is the heat of fusion for water?

334 kJ/kg (334,000 J/kg or about 80 cal/g). This is why ice is so effective at cooling drinks.

Is freezing the reverse of melting?

Yes. The same amount of energy released during freezing equals the energy absorbed during melting.

Apprendre

Understanding Newton's Laws of Motion

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