Gases & Gas Laws ver3 +vreyna

Which of these is not a part of the Kinetic-Molecular Theory (KMT) ?

• gas particle collisions are elastic

• the average kinetic energy of gas particles is proportional to the temperature

• gas particles are in constant, random motion

• gas particles are held in fixed positions

Under what conditions does a gas behave most like an ideal gas?

• low temperature and low pressure

• low temperature and high pressure

• high temperature and low pressure

• high temperature and high pressure

What gas would deviate (not follow) the most from ideal gas behavior?

• SO₃

• CO

• H₂

• O₂

Which graph shows how the pressure of a gas varies with volume?

• (A) top left

• (B) bottom left

• (C) top right

• (D) bottom right

One assumption that is made about gas particles is that the gas particles have no volume compared to the space they occupy. The other assumption is that gas particles have no

• mass

• attractive forces between them

• kinetic energy low temperatures

• pressure at low temperatures

A SCUBA diver's tank consists of 25 % oxygen, 15 % helium and 60 % nitrogen. If the total pressure in the tank is 160 atm, what is the partial pressure of the helium?

• 24 atm

• 56 atm

• 40 atm

• 2400 atm

If 8.0 liters of a gas at 2.0 atm of pressure expands to a volume of 24 liters, what is the new pressure?

• 0.33 atm

• 96 atm

• 6 atm

• 0.67 atm

5.0 liters of a gas has a kelvin temperature of 1073 K; to what CELSIUS temperature must the gas be cooled to reduce its volume to 3.0 liters?

• 371 ^oC

• 644 ^oC

• 480 ^oC

• 207 ^oC

A gas produced from a chemical reaction is collected by water displacement in a test tube; what must be done in order to get the pressure of just the gas?

• multiply the total pressure by the vapor pressure of water

• add the vapor pressure of water to the total pressure

• subtract the vapor pressure of water from the total pressure

• subtract the total pressure from the vapor pressure of water

How many grams of helium gas (atomic wt. = 4.00 g/mol) are in a rigid steel tank with a volume of 8.00 liters? The temperature and pressure inside the tank are 28.0^o C and 7600. Torr respectively (Torr is same as mm Hg)

• 0.81 g

• 12.9 g

• 3.24 g

• 139 g