Is the boiling point of liquids the hottest that liquid can get or can it get hotter?
Yes, any liquid can be made to boil at a higher temperature by increasing the pressure acting upon it. This is the principle used in a home Pressure Cooker in which the pressure of the steam produced within the cooker increases to about 15 psi (2 atmospheres). This increases the water temperature to about 125°C resulting in faster cooking of the food and, as it is being cooked in the hotter steam, the goodness in the foods is preserved. I used to work on industrial boilers where the water pressure was held at around 43 atm (630psi) of pressure at which the water boiled at 254°C (490°F).
