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Define phase change operationally

Sagot :

Answer:

Boiling

Boiling is the process by which, the liquid phase of a substance is converted into its gaseous phase. This process occurs with the increase in temperature to the boiling temperature or with the decrease in pressure to the atmospheric pressure. This process is used in cooking, purification of water, etc.

Melting

Melting is a process that converts a substance from its solid phase to its liquid phase. This phase change takes place by the application of heat, which increases the temperature of the substance to its melting point. This process is used to remodel any substance to some other shape. For e.g. we melt metal blobs and recast them into different shapes of ring and block.