19. What do you mean by change of state of
matter ? Explain :
(a) the change of a solid into a liquid at a
constant temperature, and
(b) the change of a liquid into a gas at a
constant temperature.
Answers
Answered by
3
Answer:
The change in state of matter of a substance from solid to liquid or from liquid to gas is brought by imparting heat energy to it at a constant temperature
Answered by
5
Answer:
a) The process of change of a substance from solid state into its liquid state on absorption of heat at a particular temperature , called the melting point , is called melting or fusion i.e., Solid Melting Heat absorbed Liquid.
B)
Changes of state are physical changes. They occur when matter absorbs or loses energy. Processes in which matter changes between liquid and solid states are freezing and melting. Processes in which matter changes between liquid and gaseous states are vaporization, evaporation, and condensation
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