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What is Melting (Fusion) |
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Answer» ➢ The process in which a solid substance changes into a liquid on heating is called melting (or fusion). ➢ The point of temperature at which solid melts and changes into a liquid at atmospheric pressure is called melting of the substance. ➢ When a solid substance is heated the heat energy makes its particles vibrate more vigorously. At the melting point the particles of a solid have sufficient kinetic energy to overcome the strong forces of attraction holding them in fixed positions and break to form small groups of particles. And the solid melts to form a liquid. ➢ Higher the melting point of a solid substance, greater will be the force of attraction between its particles. For example, the melting point of iron metal is very high (1535°C) which tells us that the force of attraction between the particles of iron is very strong. |
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