免费熔化热计算器
计算物质熔化所需或凝固释放的热量。
kg
J/kg
Heat Energy Required
334,000 J
Heat Energy (kJ)334.00 kJ
Heat Energy Required vs Mass
公式
## 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.
计算示例
Melting 1 kg of ice at 0°C.
- 01Q = m * Lf
- 02Q = 1 * 334000
- 03Q = 334,000 J = 334 kJ
常见问题
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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