14.2. Gas Laws http://www.ck12.org
- A sample of nitrogen in a rigid container that is originally at 25.0°C and 98.0 kPa is heated until the pressure
is 177 kPa. What is the final temperature in Kelvin? In degrees Celsius? - A 5.25 L sample of oxygen gas at 720. torr and 35°C is compressed to a volume of 3.80 L while being heated
to 78°C. What is the new pressure? - 3.30 moles of a gas occupies 95.0 L. If the gas is allowed to escape until the volume is 41.0 L, how many
moles of the gas remain? - 400.0 mL of helium is held in a container at 1.1 atm and a temperature of –5.0°C. If the gas then escapes into
a 2.0 L container while the pressure drops to 0.90 atm, what is the final temperature of the helium in degrees
Celsius? - A 250. mL sample of air at STP is injected into an evacuated sphere with a radius of 7.00 cm. The temperature
is measured to be 20.0°C. What is the pressure inside the sphere, measured in atm? (The volume of a sphere
is (4/3)πr^3 ). - 2.0 liters of hydrogen is held in a rigid container at STP. If the temperature is dropped to –65.0°C, what is the
resulting pressure in mmHg? - 870 mL of gas at a pressure of 47.4 kPa is brought to standard pressure. If the temperature remains constant,
what is the final volume?
Further Reading / Supplemental Links
- GasVolumevs.Pressure(Boyle’sLaw), (http://www.wisc-online.com/Objects/ViewObject.aspx?ID=GCH510
4) - GasVolumevs.Temperature(Charles’sLaw), (http://www.wisc-online.com/Objects/ViewObject.aspx?ID=GC
H5204) - TheCombinedGasLaw, (http://www.wisc-online.com/Objects/ViewObject.aspx?ID=GCH5404)
Points to Consider
There is one equation that relates the pressure to the volume, temperature, and number of moles when the gas is
assumed to be ideal.
- In what situations is the ideal gas law more useful than the other gas laws?
- Under what conditions can a gas be assumed to be ideal?