$7\mathrm{.}1\mathrm{.}3$ Pressure and Volume Changes in a Sealed System

$$ Make sure that the piston is partially pulled out of the cylinder and not resting on the base. Fix the piston so

that it does not move in the syringe by holding it $($only use a small force so that you can feel the change in

pressure$).$ Immerse the metal can in cool water.

$1.$ Consider the air in the entire system $($syringe$,$ rubber hose, rubber stopper and metal can$).$ As the air in the

system reaches thermal equilibrium with the cool water, describe how each of the following changes $($if at all$).$

Wherever possible, explain your answers in terms of changes to the individual molecules of air that produces

the macroscopic changes.

Volume:

Pressure:

Temperature:

Number of air molecules:

Internal energy of the gas: