To definite the coefficient of gases, the initial volume or pressure is always taken at 0^@CBut for the coefficients of expansion of solids and liquids , the initial temperature need not be taken as 0^@C. Why?

To definite the coefficient of gases, the initial volume or pressure i

1.	To definite the coefficient of gases, the initial volume or pressure is always taken at 0^@CBut for the coefficients of expansion of solids and liquids , the initial temperature need not be taken as 0^@C. Why?
Answer» Solution :the values of the coefficients of EXPANSION of SOLIDS are liquid are very small here, in this CASE the volume at any temperature can be taken as the initial volume. The coefficient of volume expansion ofa gas is relatively higher. SO if we consider volumes or pressures at DIFFERENT temperature as the inital volume or pressure, the coefficient of expansion differs considerably. Hence , to definite the coefficient of expansion of gases, the initial volume or pressure should always be taken at `0^@C`