Question

LPG is filled in cylinders under pressure so that it is in the form of liquid. When the valve is opened it changes to gas . Then it is burned and it makes a good fuel. The correct set which can be associated with these changes respectively are

Answer 1

Answer:

Normally, the gas is stored in liquid form under pressure in a steel container, cylinder or tank. The pressure inside the container will depend on the type of LPG (commercial butane or commercial propane) and the outside temperature. When you start using LPG, some of the pressure in the container is released.

The pressure at which LPG becomes liquid, called its vapour pressure, likewise varies depending on composition and temperature; for example, it is approximately 220 kilopascals (32 psi) for pure butane at 20 °C (68 °F), and approximately 2,200 kilopascals (320 psi) for pure propane at 55 °C (131 °F).