A liquid is a compound or a mixture; the chemical composition is representative for this liquid.
is there a chemical difference between the solid and liquid states of nitrogen
There is no chemical difference, the only difference is the speed in which the molecules of the substances move. Slower molecules can be solid or liquid and very high speed molecules can be gas.
The chemical composition is different.
A physical change is when something changes to a different state (solid, liquid or gas), but it does not change chemical composition; for example, it remains H2O. In a chemical change, new chemical bonds are formed.
This depends on the chemical composition of the oil.
Phase has nothing to do with chemical composition.
Yes it can, the only difference between liquid and gaseous water is it's physical form, not it's chemical composition.
is there a chemical difference between the solid and liquid states of nitrogen
Any chemical difference exist.
The difference will be in their physical state i.e., solid and liquid state and in their chemical composition. Solid fuels that are used are the filling inside bombs i.e,. gun powder. Liquid fuels used are RDX etc.
There is no chemical difference, the only difference is the speed in which the molecules of the substances move. Slower molecules can be solid or liquid and very high speed molecules can be gas.
The chemical composition is different.
A physical change is when something changes to a different state (solid, liquid or gas), but it does not change chemical composition; for example, it remains H2O. In a chemical change, new chemical bonds are formed.
It will depend on the chemical composition of the substance you are liquefying.
This depends on the chemical composition of the oil.
It is a physical change because the chemical composition has not changed.
It is a physical change because the chemical composition of the substance does not change.