ZiArc 9-10
At Sea level pressure"s" Liquid water can only exist at 212°F, Any added heat above 212°F contributes to Liquid to vapor conversion. The rate at which the liquid converts to vapor is dependent upon quantity of heat added after the 212°F mark. The steam created remains at 212°F and doesn't increase in temperature.
The amount of heat/energy required to convert liquid water into steam at 212°F is great. The heat energy absorbed by the water to make the conversion does not increase the water or steams temperature, It is heat that was introduced to the properties, But appears to go nowhere since it doesn't increase the water or steams temperature, it is LATENT.
If you add heat to steam, it can rise above 212°F. The temperature of the steam subtracted from its liquid boiling point reveals its superheat value.
Water in a pressurized vessel will not boil at its normal boiling temperature. Due to being under pressure the waters boiling point Raises. The more pressure you put on the water, The higher its Boiling point. ("If water starts to boil you can Stop the boiling by just adding pressure.) Water can remain in the liquid state at raised boiling points.
If the boiling point of water was raised to 225°F by adding pressure, it would have a superheat of 13°F. Rapidly Bringing the water down to its (Normal) sea level pressure would cause the water to rapidly Boil into steam, (Violently.)
PROPANE EXPANDS -- Propane liquid will expand 270 times as it changes from a liquid state to vapor state. For example, 1 gallon of liquid stored under pressure in a container will expand to approximately 270 gallons of vapor if released to the atmosphere. Consequently, a small amount of liquid propane has the potential to create a serious hazard. This rapid expansion ratio of 270:1 makes propane an effective refrigerant. Enough said for now..
