In case of volume expansion of a gas,mention of both the pressure and the temperature is necessary,whereas for expansion of solids and liquids, only the temperature is mentioned.Why?

In case of volume expansion of a gas,mention of both the pressure and

1.	In case of volume expansion of a gas,mention of both the pressure and the temperature is necessary,whereas for expansion of solids and liquids, only the temperature is mentioned.Why?
Answer» SOLUTION :The effect of change in pressure on the volume of a solid or a LIQUID is PRACTICALLY because of COMPACTNESS of molecules But inter-molecular attraction in gases is weak.so change in pressure significantly changes the volume ofa GAS .All substances solid liquid or gas expand or increase in temperature ingeneralHence the mention of pressure along with temperature is necessary in case of volume expansion of a gas.