Difference between real and apparent expansion of liquid
Answers
Any attempt at direct measurement of the growth of a liquid is problematical by the fact that the containing vessel itself expands. When a liquid is heated in a container, heat flows through the container to the liquid; which means that the container expands initial, due to which the stage of the liquid falls. The apparent broadly of a liquid is the portion of its volume by which the liquid appears to expand per Kelvin rise in temperature when heated in an expansible vessel. When the liquid gets heated, it expands more, beyond its original level. We cannot observe the intermediate state. This observed expansion of the liquid is known as the apparent expansion of the liquid. To estimate the apparent expansion, just fill a container until its brim with a given liquid and then heat the system. The volume poured out will be in the quantity of liquid that has apparently dilatated.
Since the expansion of liquid is complicated because of the expansion of the container, it is, therefore, necessary to distinguish between the real and apparent cubic expansively of liquid. If we consider the expansion of the container also and measure the total expansion in the volume of the liquid, then the expansion is termed as the real expansion of the liquid.