liquid phase transition. The temperature uniformity in the sample, the dependence of the indicated temperature on the heating or cooling rate, the effect of the Indium container and sample purity on the desired parameters, the importance of the data sampling rate, and systematic and random errors in measurements made should all be taken into account when you evaluate your data. Do not overheat the Indium as it will oxidize or vaporize. Breathing the fumes is to be avoided!

In designing an experiment to measure the pressure dependence of the boiling point of water, the advantages of both steady state and dynamic measurements of the pressure and temperature should be considered. What are the response times of the thermocouple and the pressure gauge? How do these influence the measurements? How much water is needed in the pressure cooker? Is the water pure, and what influence do impurities have on the measured boiling transition? Would it be of value to deliberately add some soluble impurity to the water to study this issue?

Weights should NOT be removed from the pressure release valve when the system is under Pressure. The liquid would then be Super-Heated and might undergo an explosive Phase Transition.