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Because the propane in the tank is mostly liquid and as the propane gas at the top of the tank is removed to be burned the liquid propane must evaporate to replace it. Evaporating a liquid requires heat, which the liquid takes from things around it. The tank is in closest contact with the liquid propane, so it cools fastest.
Many gasses will turn to liquid when compressed, as in Propane, when compressed becomes liquid propane gas LPG
Propane is not generally transported as a gas. In its gaseous form it would be far too voluminous. It is normally transported as a liquid compressed into cylinders. No special cooling is required during transport. However accidental puncture of the cylinders or extreme temperatures can cause the cylinders to explode.
Propane burning is a chemical change. The propane reacts with oxygen. New compounds are the result of the process.Let me add a little more information to this. Propane stored in the tank is in liquid form under pressure (actually an equilibrium of propane gas in the top of the tank, and liquid propane in the bottom). When you open the valve, the gas escapes into the hose and goes to the burners.As the gas escapes, some of the liquid propane evaporates into gas form.The change from liquid to gas is a physical change.
As its temperature descends, propane turns to liquid at -42°C.Then it remains liquid until you hit -187.7°C, where it freezesand you have a solid block of propane.
Mast
LPG stands for Liquefied Petroleum Gas, which means that it is a gas which has been compressed to liquid in cylinders. For more info, go this website: http://en.wikipedia.org/wiki/Liquefied_petroleum_gas
KG is only used for liquified gas in cylinders such as propane which is sold by weight. Compressed gas and bulk liquid such as nitrogen is not sold by weight.
Because the propane in the tank is mostly liquid and as the propane gas at the top of the tank is removed to be burned the liquid propane must evaporate to replace it. Evaporating a liquid requires heat, which the liquid takes from things around it. The tank is in closest contact with the liquid propane, so it cools fastest.
Many gasses will turn to liquid when compressed, as in Propane, when compressed becomes liquid propane gas LPG
gas and liquid
Propane is not generally transported as a gas. In its gaseous form it would be far too voluminous. It is normally transported as a liquid compressed into cylinders. No special cooling is required during transport. However accidental puncture of the cylinders or extreme temperatures can cause the cylinders to explode.
LP, Liquid propane, Propane. All the same thing.
Propane
Propane burning is a chemical change. The propane reacts with oxygen. New compounds are the result of the process.Let me add a little more information to this. Propane stored in the tank is in liquid form under pressure (actually an equilibrium of propane gas in the top of the tank, and liquid propane in the bottom). When you open the valve, the gas escapes into the hose and goes to the burners.As the gas escapes, some of the liquid propane evaporates into gas form.The change from liquid to gas is a physical change.
Liquefied propane is propane gas compressed to form liquid. Generally one of the component of LPG gas.
As its temperature descends, propane turns to liquid at -42°C.Then it remains liquid until you hit -187.7°C, where it freezesand you have a solid block of propane.