How is experiment of apparent coeffient of expansion of a liquid conducted?

Answer 1

Put the liquid into a volumetric flask and note the apparent volume change over a measured temperature increase. Calculate its apparent coefficient of volume expansion by dividing the apparent volume change by the temperature change. (Note that the temperature change should be moderate because the coefficient of expansion may change with temperature.)
Because the flask is also expanding, its expansion must be added to the apparent expansion of the liquid (expansion relative to the flask). Determine the coefficient of volume expansion of the flask COVE from the linear coefficient of linear expansion COLE of the glass. (Strictly speaking, you'd calculate it as COVE = ((1 + COLE)^3) - 1, but 3 * COLE is very close). Say it's borosilicate glass with a COLE of 3.3*10^-6/degK (see ref.). Then its COVE can be estimated as about 1^10^5/degK.
Add the flask's COVE to the apparent coefficient of volume expansion of the liquid to get (close to) its true coefficient of volume expansion.