P = 850 mmHg
1 atm ............................. 760 mmHg
P atm .............................. 850 mmHg
=> P = 1,118 atm.
PV = niuRT => niu = PV/RT = 1,118x28/0,082x(273+45)
=> niu = 1,2 moli
in c.n. Vm = 22,4
niu = V/Vm => V = niuxVm
= 1,2x22,4 = 26,88
=> ca volumul scade (28/26,88) de 1,04 ori