Gas Behavior and Pressure
This is the term for the force per unit area exerted by gas particles hitting the walls of their container.
What is gas pressure?
This gas law describes the relationship between pressure and volume at constant temperature.
What is Boyle's Law?
In PV = nRT, this letter represents the number of moles of gas.
What is n?
The "T" in STP stands for this value.
What is temperature? (273K)
The formula used to convert Celsius to Kelvin.
What is K = °C + 273?
Unlike solids and liquids, gases are highly __________, meaning their volume can be greatly reduced by applying pressure.
What is compressible?
According to Charles's Law, if the temperature of a gas increases at constant pressure, the volume will do this.
What is increase?
This law uses the formula PV = nRT and accounts for the number of moles of gas.
What is the ideal gas law?
At STP, every mole of an ideal gas occupies this volume.
What is 22.4 L?
100°C converted to Kelvin.
What is 373 K?
When more gas particles are added to a sealed container at constant temperature, this happens to the pressure.
What is increases?
A basketball is left outside on a cold night and deflates slightly. This type of relationship — described by Charles's Law — explains why.
What is a direct relationship?
The value of R in the Ideal Gas Law, when using atm, L, mol, and K.
What is 0.0821 L·atm/mol·K ?
The number of g in 67.2 L of oxygen gas at STP.
What is 3 moles?
This is the Kelvin equivalent of absolute zero, the coldest possible temperature.
What is 0 K?
The unit of pressure used in this class, equal to the pressure of Earth's atmosphere at sea level.
What is 1atm?
A sealed aerosol can is left in a hot car. The volume cannot change, but this variable increases according to Gay-Lussac's Law.
What is pressure?
The Combined Gas Law is used instead of a simple gas law when...
Answers may vary. More than one pressure, volume, and temperature must be given / A gas has a 'before' and 'after' scenario.
The mass of 0.5 moles of nitrogen gas at STP.
What is 11.2 L?
A gas law problem gives a temperature of −23°C. Before plugging into any formula, you must convert it to this Kelvin value.
What is 250 K?
Gas particles exert pressure because they are constantly doing this to the walls of their container.
What is colliding or hitting?
According to Boyle's Law, if the pressure on a gas triples while temperature stays constant, the volume will do this.
What is decrease? (by 1/3 of original value)
Using the Ideal Gas Law, this is the volume occupied by 2.0 mol of gas at 1.0 atm and 273 K
What is 44.8 L?
True or False: The molar volume of 22.4 L/mol applies to ALL ideal gases at STP, regardless of what type of gas.
True!
True or False: A student forgets to convert 27°C to Kelvin and uses 27 instead of 300 in a gas law calculation. Their answer will still be accurate because these values represent the same temperature and are therefore interchangeable.
False! You MUST use Kelvin when plugging in temperature to the ideal or combined gas laws.