Determination of melting point
Steps that you have to follow
#2 Take compound on a white paper. Divide the compound finely using glass rod. Fill the capillary tube with the finely divided compound.
#3 We need a thermometer to measure melting point. The capillary tube with the sealed end at the bulb of the thermometer is tied using thread.
#4 The Theil’s tube is filled with paraffin oil which has a high boiling point more than 370-degree Celsius. Thermometer with tied capillary is immersed in the paraffin oil.
#5 The bulb of the thermometer is near the side arm of the Theile’s tube which is clamped to a stand.
#6 The triangular sidearm of the Thiele’s tube is heated maintaining uniform temperature due to convection current.
#7 When the substance in the capillary tube starts melting, heating is discontinued.
#8 The temperature at which the substance melts completely is recorded which is the melting point of the substance