Melting point of wax

MELTING POINT OF WAX

Aim:

To determine the melting point of wax using cooling curve.

Principle:

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.

Materials Required:

Beaker, burner, thermometer, boiling tube, retort stand and clamp,wire gauze, tripod stand, candle wax, stop watch, bowl of sand.

Procedure:

·           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

Diagram

Graph

Observation and Tabulation:

The temperature at the point M denotes the melting point of wax

Suggestion:

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