some substances can not exist in the gaseous state other,other cannot exist in the liquid state and cannot exist either in the gaseous or the liquid state living substances
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Ideally, there is no element that cannot exist in all three stages. Though, some elements cannot exist in some stages under normal circumstances.
Carbon dioxide, for example, can exist in a solid state (commonly known as "dry ice") and if heated, it turns into a gas, without going through the liquid state. However, that does not mean that carbon dioxide cannot form a liquid under any circumstances.
For every chemical, there is what chemists call a "phase diagram" which shows the different phases (solid, liquid, and gas) which exist under different combinations of temperature and pressure (pressure normally refers to air pressure, although other kinds are possible).
Almost any chemical is capable of forming any phase under the right combination of temperature and pressure. The only exception is helium, which has no solid phase. It can be a gas or a (very cold) liquid, but not a solid. That is because helium is the most inert of all inert elements, and it has extremely little inter-atomic attraction, which is insufficient to form a solid phase even at the coldest possible temperature (absolute zero, in degrees Kelvin).
Any substance, if heated sufficiently, will become a gas. Some substances require higher temperatures than others.
Solids are the substances which can not exist in gaseous state or liquid state. Example Stone, Marble, Clay etc.
Carbon dioxide, for example, can exist in a solid state (commonly known as "dry ice") and if heated, it turns into a gas, without going through the liquid state. However, that does not mean that carbon dioxide cannot form a liquid under any circumstances.
For every chemical, there is what chemists call a "phase diagram" which shows the different phases (solid, liquid, and gas) which exist under different combinations of temperature and pressure (pressure normally refers to air pressure, although other kinds are possible).
Almost any chemical is capable of forming any phase under the right combination of temperature and pressure. The only exception is helium, which has no solid phase. It can be a gas or a (very cold) liquid, but not a solid. That is because helium is the most inert of all inert elements, and it has extremely little inter-atomic attraction, which is insufficient to form a solid phase even at the coldest possible temperature (absolute zero, in degrees Kelvin).
Any substance, if heated sufficiently, will become a gas. Some substances require higher temperatures than others.
Solids are the substances which can not exist in gaseous state or liquid state. Example Stone, Marble, Clay etc.
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