Chemistry
(a) Define interconversion of states of matter.
(b) Why do solids, liquids and gases differ in their physical state?
(c) Under what conditions do solids, liquids and gases change their state?
Matter
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Answer
(a) The phenomenon of change of one state of matter into another and then back to the original state without any change in its chemical composition, is called interconversion of states of matter. It occurs due to change in temperature and pressure.
(b) Solids, liquids and gases differ in their physical state due to difference in their intermolecular space and intermolecular forces of attraction.
Solids have negligible intermolecular space as the molecules are closely packed and the force of attraction is maximum. In liquids the molecules are less tightly packed as compared to solids, so the intermolecular space is larger and force of attraction is weaker. In gases the molecules are far apart so the intermolecular space is very large and the force of attraction is the least.
(c) Solids, liquids and gases change their state by change in temperature and by applying pressure.
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