Determination of melting point of wax when a substance changes state, its temperature remains constant. If the substance is solid, the co...
Determination of melting point of wax
when a substance changes state, its temperature remains constant. If the substance is solid, the constant temperature at which the substance changes from solid state to liquid state at normal atmospheric pressure is called melting point of the given solid. For example, the melting point of wax is 60 ° C which means that the wax is converted from its solid state to liquid state at the temperature of 60 ° C.
To determine the melting point of wax, take a small quantity of wax in a beaker and slowly heat the beaker by a candle or a bunsen burner.
Note down the temperature of wax, say after every 2 minute. The temperature of wax increases initially but once it starts melting, its temperature remains constant which is called its melting point. On further improving heat the temperature remains constant at melting point until the whole of the wax is converted into liquid.