why are somr substances found in the liquid state solid state and in gaseous state
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Answer:-
Some substances exist as gases at room temperature (oxygen and carbon dioxide), while others, like water and mercury metal, exist as liquids. Most metals exist as solids at room temperature. ... (b) Liquid O2 conforms to the shape of its container but has a fixed volume; it contains relatively densely packed molecules.
For many substances, solid, liquid and gaseous states exist at the correct temperature and pressure.
Diamond does not exist in the gaseous state. Upon melting, the liquid carbon is no longer diamond.
Dry ice (the solid form of carbon di oxide) goes directly to a gas at normal pressures. Given sufficient pressure (in a steel cylinder) the liquid form can exist. Any solid compound which decomposes upon heating will never be found in the liquid state, but sometimes very low pressure and laser excitation can turn the solid into a gas.
Substances which cannot exist in the gaseous state are usually complex organics. Albumin (and most proteins), DNA, and enzymes can be produced in a solution or the solid state but generally are in liquid or gaseous state. These compounds denature and decompose with higher temperatures.