If you boil water, it is a physical change because it is still water; it's just water vapor. When water boils, the bubbles are caused by heat, and they are not a new substance — just the same old water, but now, (because sufficient heat has been added), it is a gas instead of a liquid.
Accordingly, what can survive in boiling water?
Many bacteria, such as Clostridium, can form endospores (a dormant stage that allows them to survive adverse conditions for a while), such as , which allow them to survive boiling water. Autoclaves use a temperature of 121 degrees C to be sure to kill all endospores and any other possible contaminants.
How long do you have to boil something to disinfect it?
One of the most popular methods of sterilizing is boiling. Place bottles, spoons, nipples, lids and other equipment into a pot of water and bringing it to a rolling boil for 2 minutes. You can cover and store the equipment in a clean place .