As part of a physics experiment, air under high pressure is allowed to expand isentropically out of a metal can and into an empty plastic bag. When the expansion is complete, the bag and contents are at atmospheric pressure. The air inside the can is initially at \(5.0 \mathrm{~atm}\) and \(25^{\circ} \mathrm{C}\). What is the air's temperature once it is in the plastic bag?