Science Experiment Sample

Determination of boiling point of water

Fusion tube, capillary tube, tripod, kerosene burner, thermometer,
aluminium block, Pasteur pipette and stand with clamp

1. In a fusion tube, transfer 4-5 drops of water with the help of
Pasteur pipette and place it in one of the holes of the
aluminium block (B.P. and M.P. apparatus).Care should be
taken such that water level in the fusion tube is visible after
placing it in the hole. Seal one end of a capillary tube in the
flame of the kerosene burner. Dip the open end of the capillary
tube into water in the fusion tube.
2. Insert the thermometer in the second hole of the aluminium
block.
3. Put the aluminium block on the tripod stand and heat the
apparatus with the help of kerosene burner slowly.
4. Observe what happens to water. Do you see any bubbles
arising slowly in the fusion tube?
5. Record the temperature when you observe a steady stream
of bubbles. This temperature is the boiling point of water. Do
you observe any further rise in temperature after the steady
stream of bubbles started coming out?

1. Boiling point of water is remains constant during the boiling
of water.