Gas Quiz - Rd 1 PV = nRT R = L atm mol K P1V1 = P2V2 T T2

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Gas Quiz - Rd 1 PV = nRT R = 0.0821 L atm mol K P1V1 = P2V2 T1 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 0.750 mole of oxygen gas at 25.0 oC and 725 torr?

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 T1 T2 (750 mm Hg)(5.8 L) = (9.6 L)(380 mm Hg) 278 K T2 T2 = 233 (230) K - 273 = -40oC (-43oC)

PV = nRT V = nRT P P = 725 torr x 1 atm = 0.954 atm 760 torr What is the volume of 0.750 mole of oxygen gas at 25.0 oC and 725 torr? PV = nRT V = nRT P P = 725 torr x 1 atm = 0.954 atm 760 torr V = (0.750 mole)(0.0821 L* atm/mol*K)(298 K) 0.954 atm V = 19.2 L