pressure and temperature determine the state of substance. explain this in detail
Answers
Answer:
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Thanks for asking!!
Here's your answer..
"Pressure and temperature determine
the state of a substance"
A solid can be converted into liquid
and then to gas by decreasing the
pressure and increasing the
temperature.
>A gas can be liquefied by increasing
the pressure and decreasing the
pressure
>Same is the method for converting a
liquid into a solid.
> Every state of matter of any
substance is stable at a corresponding
pressure and temperature. Thus,
temperature and pressure determines
the state of a substance.
Explanation:
When a solid is heated then there is increase in
temperature which causes breakage in between
strong intermolecular bonds of the atoms. As a
result, the atoms move at a distance and start to
collide.
Thus, there will be increase in the kinetic energy
and there will be change in the state of matter.
For example, when ice is kept at room
temperature then it starts to melt because of the
surrounding heat. As a result, it changes into
water.
On further increasing the temperature, the liquid
state will convert into gaseous state.
Similarly, when we increase pressure on a liquid
substance or matter then the molecules start to
come closer to each other. As a result, the liquid
state will change into solid.
Also, when pressure is increased on a gas it will
start to convert into liquid state.
Hope this helps!!
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1) Any matter i.e., solid, liquid or gas when experiences an increase in temperature then they change their state.
Take ice cubes in a beaker or heat them slowly, the temperature increases and the ice melts to form liquid. Heat this liquid further it will become steam.
(2) On lowering down the temperature of any matter, show change in their state
Take the steam that is coming out of a boiling water and allow it to cool down, it condenses to form water and on further cooling of this water we get ice.
(3) On applying pressure and reducing temperature we can liquefy gases or change them into solid.
Example: Take carbon-dioxide gas, reduce its temperature and apply lot of pressure on it so that it changes into solid carbon dioxide, called dry ice, which is used as refrigerant for cooling.
If the pressure on it is decreased it directly changes into gas.
In LPG cylinders, the petroleum gas is cooled and with lot of pressure changes it into liquid state.
While using this LPG, we release the pressure exerted on it and hence it comes out in the form of gas..