A hand-held electronics duster canister contains liquid tetrafluoroethane under pressure.
(i) Tetrafluoroethane boils at a temperature of −26∘C-26^\circ\text{C}−26∘C to form a gas. Convert this boiling temperature to the Kelvin scale.
(ii) State one way in which the behavior or arrangement of molecules in tetrafluoroethane gas differs from that of molecules in liquid tetrafluoroethane.
(iii) Explain, in terms of the kinetic theory of gases, how the molecules of the gas exert a pressure on the interior surface of the canister.
When the nozzle is depressed, a volume of 160 cm3160\text{ cm}^3160 cm3 of gas at an internal pressure of 350 kPa350\text{ kPa}350 kPa escapes from the canister. As it escapes into the room, its pressure drops to the ambient atmospheric pressure of 100 kPa100\text{ kPa}100 kPa.
Calculate the volume of this escaped gas at 100 kPa100\text{ kPa}100 kPa, assuming that the temperature of the gas remains constant during the expansion.
Once the nozzle is released and closed, the gas remaining inside the canister cools down substantially, resulting in a temperature decrease. Explain what happens to the pressure of the gas remaining inside the canister.
