Question

Explain interconversion of states of matter. What
are the two factors responsible for the change of
state of matter ?
State the main postulates of kinetic theory of
matter
What happens to water if
(a) it is kept in a deep freezer ?
(b) it is heated ?
Explain the phenomenon of change of state​

Answer 1

$\large\underline{\underline\mathrm\green{QUESTION\:1}}$

Explain interconversion of states of matter. What are the two factors responsible for the change of state of matter ?

$\large\underline{\underline\mathrm\purple{SOLUTION}}$

The process by which matter changes from one state to another and back to original state, without any change in its chemical composition is called interconversion state of matter.

Two factors responsible for change of state of matter are:

(I) change in Temperature

(II) change in Pressure

• States of matter are inconvertible by applying Heat and pressure to them.
• When solids are heated the inter molecular force of attraction between particles decreases and they converts into liquids.
• Liquids on further heating converts into gases .

$\large\underline{\underline\mathrm\green{QUESTION\:2}}$

State the main postulates of kinetic theory of

matter.

$\large\underline{\underline\mathrm\purple{SOLUTION}}$

THE MAIN POSTULATES OF KINETIC THEORY OF MATTER.

1.Gases are tiny molecules in mostly empty space.

2. There are no attractive forces between molecules.

3. The molecules move in constant, rapid, random, straight-line motion.

4. The molecules collide elastically with container walls and one another.

5. The average kinetic energy of the molecules is proportional to the Kelvin temperature of the sample.

$\large\underline{\underline\mathrm\green{QUESTION\:3}}$

What happens to water if

(a) it is kept in a deep freezer ?

(b) it is heated ?

$\large\underline{\underline\mathrm\purple{SOLUTION}}$

If water is kept in deep freezer then it will become ice which is in solid state. And after that, if the ice is heated, it will become once again water which is liquid. If you heat it more, it will transform into vapours which is in gaseous state.

$\large\underline{\underline\mathrm\green{QUESTION\:4}}$

Explain the phenomenon of change of state.

$\large\underline{\underline\mathrm\purple{SOLUTION}}$

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.