Question

LPG is a gas cylinder is in the form of a liquid which physical and chemical changes occur when it come out of the cylinder and burns

Answer 1

Did you know that every time you turn on one of your gas appliances, the LPG in your gas bottles starts to boil?

If you could see though the steel, you would also notice that it looks just like water boiling.

The big difference is that it happens at -42°C or -44°F.

This is vaporisation, which is how LPG – propane – goes from liquid to vapour (gas).

LPG (Propane) Vaporisation - How LPG Boils

To boil, the liquid LPG draws heat from the steel walls of the gas bottle which, in turn, get heat from the ambient air.