Abbreviations
What does "STP" stand for?
Standard temperature and pressure
in pV=nRT, what units should T be in?
kelvin
A balloon contains 2.0 moles of helium at 25 °C and 1.0 atm. What is the temperature of the balloon in K?
298.15
A gas occupies 10.0 L at 300 K and 2.0 atm. What is the value of R used?
0.08206
faster
what does "atm" stand for?
atmosphere
in pV=nRT, what units should n be in?
moles
A balloon contains 2.0 moles of helium at 25°C and 1.0 atm. What is the volume of the balloon?
49 atm
A gas occupies 10.0 L at 300 K and 2.0 mmHg. How many moles of gas are present?
.0011 moles
gases have no set _____ or ______
volume, shape
in pV=nRT, what does "P" stand for?
pressure
in pV=nRT, what units should p be in?
atm
A gas cylinder contains 3.5 moles of argon at 22°C and a pressure of 4.5 atm. What is the volume of the cylinder?
21 L
A sealed container holds 14.007 grams of nitrogen gas at 27.0°C and a volume of 8.00 L. What is the pressure inside the container in mmHg?
1170 mmHg
If the volume of a bag increases while moles and temperature stay the same, what must happen to the pressure of the gas?
It must decrease
in pV=nRT, what does "n" stand for?
moles of gas
in pV=nRT, what units should V be in?
L
A balloon contains 2.0 grams of Argon at 25°C and 1.0 atm. What is the volume of the balloon?
1.1 L
A scuba tank holds 12.0 L of compressed air at 200 atm and 20. °C. If the air is released into a room at 1.0 atm and 20. °C, what volume will it occupy?
2400 L
gas molecules are relatively ____ apart and don't interact with each other much (low attractive forces)
far
in pV=nRT, what does "R" stand for
gas constant
If given 1.2 atmosphere of a 200 cm3 vessel in pV=nRT, what units should R be in?
L-atm/mol-K
A 3.0 L container holds an unknown gas at 27°C and 2.0 atm. The gas has a mass of 9.6 g. Using the ideal gas law, identify the gas.
Argon
A weather balloon is filled with 500 moles of hydrogen at ground level where the temperature is 15°C and pressure is 100.0 kPa. At altitude, the balloon expands to 14,000 L and the temperature drops to -40°C. What is the pressure at altitude?
69.2 kPa
temperature is the measure of _____________ energy
kinetic