If you gently shake a carbon dioxide fire extinguisher, you will feel the presence of liquid within the extinguisher What conditions within the extinguisher mean that the CO, is liquid in this case?

When we wish to convert a gas to liquid we have to either

a) decrease temperature

b) increase pressure

In case of fire extinguisher the CO2 is found to be in liquid state, this is as the CO2 is pressurized at high pressure which keeps CO2 in liquid state

the ideal pressure and temperature conditions when CO2 gas can be converted to CO2 gas

Pressure = 5 - 73 atm

Temperature = - 57 to 31 degree Celsius