Calculadora de Calor de Fusão
Calcule a energia necessária para fundir uma substância usando Q = m·Lf. Insira a massa e o calor latente de fusão do material.
kg
J/kg
Heat Energy Required
334,000 J
Heat Energy (kJ)334.00 kJ
Heat Energy Required vs Mass
Formula
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.
Exemplo Resolvido
Melting 1 kg of ice at 0°C.
- 01Q = m * Lf
- 02Q = 1 * 334000
- 03Q = 334,000 J = 334 kJ
Perguntas Frequentes
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.
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