Vocabulary
273K or 0oC is _________ __________.
Standard Temperature
What is the ideal gas constant (include units)
R = 0.08205 L atm/ mol K
What pressure will be needed to reduce the volume of 77.4 L of helium at 98.0 kPa to a volume of 60.0 L?
126.42 kPa
Graham's Law is a way of comparing the ______ or ______ rate of two different gases.
Diffusion/Effusion
Density is mass per unit _________.
Volume (g/L)
______ Law states that under identical conditions of temperature and pressure, two gases' relative diffusion rates very inversely with square roots of their molar masses.
Graham's
What are the three units of pressure?
atm, mmHg (torr), kPa
A balloon has a volume of 10500 L if the temperature is 15oC. If the temperature is -35oC, what will be the volume of the balloon?
8,677 L
What is the formula to determine the rate of two different gases. Gas A and Gas B.
rateA/ rateB = square root (MMB/MMA)
What is the density of Ethane (C2H6) at STP?
1.34 g/L
Force per unit area on a surface is _________.
Pressure
What is standard pressure in kPa?
101.3 kPa
A 250.0 mL sample of chlorine gas is collect when the pressure is 105.2 kPa. What is the volume of the sample after the barometer drops to 100.3 kPa?
262.2 mL
A sample of oxygen took 55 seconds to travel a certain distance. How long would it take for the same number of moles of nitrogen to travel the same distance?
51.45 seconds
What is the density of CO2 at 27oC and 0.275 atm?
0.313 g/L
Adding the partial pressures of all the gases in a container to find the total pressure in the container demonstrates ______ Law.
Dalton's
True or False: Gas particles travel in a continuous straight-line until they collide another gas particle or with the wall of the container.
True
What is the pressure in atmospheres of 10.5 mol of acetylene in a 55.0 L cylinder at 37oC?
4.86 atm
Compare the rate of effusion of Neon to the rate of effusion of helium.
RateNe 1 = 0.445 RateHe
What is the molar mass of a gas if a 3.42 L container at 37oC and 325 torr contains 2.13g of the gas? (Hint: End unit should be g/mol)
37.1 g/mol
______ is the measure of the average kinetic energy of particles in a substance.
Temperature
True or False: The average kinetic energy of gas particles is dependent ONLY upon the pressure of the gas.
FALSE: It is dependent on the Temperature.
A sample of carbon monoxide has a volume of 344 mL at 85oC and a pressure of 88.4 kPa. Determine the amount of moles of carbon monoxide present.
0.0102 mol
A sample of hydrogen gas traveled 45 m in a given amount of time. An unknown gas traveled 7.6 m in the same amount of time. What is the formula mass of the unknown gas?
70.82 g/mol or 71 g/mol
Calculate the volume of H2 at 46oC and 302.1 kPa released by the reaction of 16.4g Al in the following reaction:
2Al (s) + 2H3PO4 (aq) --> 3H2 (g) + 2AlPO4 (s)
(Hint: You are going from grams of Aluminum to liters of H2. You must cancel everything but liters.)
8.00 L H2