Explain the experiment of measuring the real and apparent expansion of a liquid with a neat diagram.

Explanation

(i) The liquid whose real and apparent expansion is to be determined is poured in a container up to a level. Mark as `L_(1)`.
(ii) Heat the container and the liquid using a burner.
(iii) Initially, the container recieves the thermal energy and it expands.

(iv) As a result, the volume of the liquid appears to have reduced . Mark it `L_(2)`.
(v) On further heating, the thermal energy is supplied to the liquid through the container resulting in the expansion of the liquid. Hence, the level of liquid rises to `L_(3)`.
(vi) Now, the difference between the levels `L_(1)` and `L_(3)` is called as apparent expansion , and the difference between the levels, `L_(2) " and " L_(3)` is called real expansion.
(vii) The real expansion is always more than the apparent expansion.
(viii) Real expansion =`L_(3) - L_(2)`
Apparent expansion = `L_(3)-L_(1)`