Term 3 Week 7 - Youtube Video Demonstration of Cooling Curve of Napthalene

3E1 's Rekha and Harmeet

3E1's Elaine and Cheryl

The experiment was conducted with the Science (Physics) pupils at the subsequent weeks and there was a slight modification (direct heating) which allowed the solid-state napthalene to melt at a faster speed.

The Youtube video above shows the example without the use of datalogger temperature probes instead of the conventional method of mercury thermometer. It also shows the change in the napthalene as it cools down from a high to a low temperature. The solidification process is clearly captured in the video as napthalene cools down.

3E2's Zhao Wei and Ganeish

3E2's Fadeelah and Ashikin

3E2's Yunru and Nurul

The experiment has shown the full capacity of the use of dataloggers to measure fixed intervals of temperature instead of the conventional method. At the end of experiment, the teacher summaries the lesson by linking the observations to the cooling curve and to indicate the melting point/freezing point of napthalene.