1. Gas Quiz - Rd 1
PV = nRT
R = L atm
mol K
P1V1 = P2V2
T T2
1 atm = 760 mm Hg
A 5.8 L sample of gas at 5.0oC and 750 mm Hg
is cooled so that the volume becomes 9.6 L and
the pressure 380 mmHg. What is the temperature
in oC?
What is the volume of mole of oxygen gas
at 25.0 oC and 725 torr?

3. P1V1 = P2V2 T1 T2 (750 mm Hg)(5.8 L) = (9.6 L)(380 mm Hg) 278 K T2
A 5.8 L sample of gas at 5.0 oC and 750 mm Hg is
cooled so that the volume becomes 9.6 L and the
pressure 380 mm Hg. What is the temp in oC?
P1V1 = P2V2
T T2
(750 mm Hg)(5.8 L) = (9.6 L)(380 mm Hg)
278 K T2
T2 = 233 (230) K
= -40oC (-43oC)

4. PV = nRT V = nRT P P = 725 torr x 1 atm = 0.954 atm 760 torr
What is the volume of mole of oxygen gas at
25.0 oC and 725 torr?
PV = nRT
V = nRT P
P = 725 torr x 1 atm = atm
760 torr
V = (0.750 mole)( L* atm/mol*K)(298 K)
0.954 atm
V = 19.2 L