why does a change of state occur .answer the following in short
Answers
Answer:
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.
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 while the temperature remains constant.
(a) The process of change of a substance from solid state into its liquid state on absorption of heat at a particular temperature is called melting/fusion and the temperature at which it happens is called the melting point.
(b) The process of change of a substance from a liquid state to its gaseous state at a particular temperature is called boiling and the temperature at which it happens is called the boiling point.