Super Heated Water

water that is heated above its boiling point  boiling point, 100 °C (212 °F) and pressurized to maintain it as a liquid. Superheated water is stable because of overpressure that raises the boiling point, or by heating it in a sealed vessel with a headspace, where the liquid water is in equilibrium with vapour at the saturated vapor pressure. To form Vapor bubble, the temperature of the liquid needs to be high enough that the  vapor pressure of the liquid exceeds the vapor pressure of the air. But while superheating, the liquid doesn't boil even though it is hot enough, because the surface tension of the liquid suppresses the formation of the bubble with external pressure.

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