Melting-point meaning

mĕl'tĭng
The temperature at which a solid becomes a liquid at a fixed pressure, usually standard pressure.
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The temperature at which a solid and its liquid are in equilibrium, at any fixed pressure.
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The temperature at which a specified solid becomes liquid.
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The temperature at which a solid, given sufficient heat, becomes a liquid. For a given substance, the melting point of its solid form is the same as the freezing point of its liquid form, and depends on such factors as the purity of the substance and the surrounding pressure. The melting point of ice at a pressure of one atmosphere is 0°C (32°F); that of iron is 1,535°C (2,795°F).
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(chemistry) The temperature at which the solid and liquid phases of a substance are in equilibrium; it is relatively insensitive to changes in pressure.
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Melting-point Sentence Examples

  • that of the greatest fusibility or lowest melting-point.

  • When heated above its melting-point, it yields ammonia, cyanuric acid, biuret and ammelide.

  • Soc., 18 93, 6 3, p. 465) states, that the melting-point of any odd member of a homologous series is lower than the melting-point of the even member containing one carbon atom less.

  • By rapidly stirring molten iron oxide into molten pig iron in a furnace shaped like a saucer, slightly inclined and turning around its axis, at a temperature but little above the melting-point of the metal itself, the phosphorus and silicon are removed rapidly, without removing much of the carbon, and by this means an extremely pure cast iron is made.

  • The dry process is more frequently practised, for the easy reducibility of the oxide and sulphide, together with the low melting-point of the metal, renders it possible to effect a ready separation of the metal from the gangue and impurities.

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