In class, we did a lab to determine the boiling point of rubbing alcohol. We used a thiele tube filled with water and place a test tube attached to a thermometer w/rubber band in it. However, we never saw any signs of boiling. We conducted several trials, the temperature went all the way above 93 degrees, but there was no sign of boiling. Our teacher said we overshot it..but I don't think that makes sense. Even if the temperature of the water exceeded the boiling point of the alcohol, the alcohol should have begun to boil. Also, I don't understand the point of using the water and thiele tube setup. Why not directly heat the rubbing alcohol and measure the temperature in it? The temperature will stop changing at the boiling point allowing for easy detection.