On a spring morning (20 degree C) you fill your tires to a pressure of 2.25 atmo
ID: 1067526 • Letter: O
Question
On a spring morning (20 degree C) you fill your tires to a pressure of 2.25 atmospheres. As you ride along, the tire heats up to 45 degree C from the friction on the road. What is the pressure in your tires now? A gas has a volume of 175 L at 760. torr and 288 K. What is the temperature if the gas volume and pressure are changed to 198 L and 640. torr? A given mass of oxygen at room temperature occupies a volume of 500.0 mL at 1.50 mL) pressure. What will be the pressure if the volume is reduced to 150.0 mL? Gases are sold in large cylinders for laboratory use. What pressure, in atmospheres. will be exerted by 2.500 g of oxygen gas (O_2) when stored at 22 degree C in a 40.0 L cylinder? Consider the following reaction at STP: CuO(s) + H_2(g) rightarrow cu(s) + H_2O(g) If 40.0 g of CuO react with an excess of H_2, how many liters of H_2O will be produced?Explanation / Answer
2. Intial Final
P1 = 2.25atm P2 =
T1 = 20C0 = 20+273 = 293K T2 = 45C0 = 45+ 273 = 318K
P1/T1 = P2/T2
P2 = P1T2/T1
= 2.25*318/293 = 2.44atm
3. Intial Final
P1 = 760torr P2 = 640torr
V1 = 175L V2 = 198L
T1 = 288K T2 =
P1V1/T1 = P2V2/T2
T2 = P2V2T1/P1V1
= 640*198*288/760*175 = 274.4K
Initial Final
P1 = 1.5atm P2 =
V1 = 500ml V2 = 150ml
P1V1 = P2V2
P2 = P1V1/V2
= 1.5*500/150 = 5atm