What happens to the volume measurement of a volumetric flask calibrated at 20°C if the liquid is heated before measurement?

When a liquid is heated, it generally expands due to the increase in kinetic energy of its molecules. This expansion causes the liquid to occupy a greater volume at higher temperatures compared to its volume at lower temperatures. A volumetric flask is calibrated to deliver a specific volume of liquid at a defined temperature, often 20°C.

If the liquid within the volumetric flask is heated above this calibration temperature, the liquid's volume will increase. As a result, the flask will contain a greater quantity of liquid than the calibrated volume indicates at a lower temperature. Therefore, selecting that heating the liquid causes the volumetric flask to contain more volume correctly reflects the physical behavior of liquids in response to temperature changes.