MELTING POINT OF WAX
To determine the melting point of wax using cooling curve.
The determination of melting point is based on latent heat which is the amount of heat required to change a unit mass (1gm) of a substance from one state to another state without changing its temperature.
Beaker, burner, thermometer, boiling tube, retort stand and clamp,wire gauze, tripod stand, candle wax, stop watch, bowl of sand.
· Melt the wax in a warm water bath.
· When the wax is melted entirely, remove it from the bath, dry it and then bury it in sand.
· Record the temperature each 30 seconds while the liquid is being converted to solid.
· At the same time watch for constant temperature at which liquid and solid are present. Melting point of wax= Constant Temperature over a period of time
The temperature at the point M denotes the melting point of wax
With the help of ICT corner, the teacher can show the live video of the experiment of melting point of wax using the link www. kau.ed u.sa