What do you mean by change of state of matter? Explain the change of a solid into a liquid at a constant temperature.
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Answer 1:
A change of state is a physical change in a matter.
They are reversible changes and do not involve any changes in the chemical makeup of the matter.
Common changes of the state include melting, freezing, sublimation, deposition, condensation, and vaporization.
Answer 2:
The process of change of solid substance into liquid substance is called melting or fusion.
The constant temperature at which solid becomes liquid upon absorption of heat at constant pressure is called melting point of a substance.
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