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MotionLab
Why ice stays at 0°C while melting — the energy goes into breaking molecular bonds, not raising temperature.
During melting or boiling, all added energy goes into breaking intermolecular bonds rather than increasing kinetic energy (temperature) — this is why a pot of boiling water stays at exactly 100°C (at sea level) no matter how high you turn up the heat, until all the water has boiled away.
Melting/freezing (fusion) and boiling/condensing (vaporization) each have their own latent heat value for a given substance, and vaporization almost always requires much more energy than fusion — which is why steam burns are often worse than boiling-water burns at the same temperature.
Heat energy (J)
334,000
Q = mL
What you entered
Q = mL
1 × 334000= 334000 JResult
Heat energy (J): 334,000
A phase change of 1kg needs 334,000 J of energy.