+ Text Only Site
+ Non-Flash Version
+ Contact Glenn
Guide to Propulsion
Reaction of Gases
- Give one effect the compressibility
of air has on an object moving through it.
Above 200 miles per hour, compressibility
of air causes drag on the object moving through it.
- In the Animated
Gas Lab, what happens to the volume of a gas when you freeze
mass and pressure and increase the temperature? Why does this
The volume increases. The volume increase
is due to expansion caused by increased heat.
- When temperature and mass
remain constant, what will happen to the pressure when the volume of
a gas is decreased? Why?
The pressure will increase, because there
is physically less space available for the same amount of gas.
- Why does an increase in
the mass of a gas increase the volume of that gas within the chamber?
(Temperature and pressure remain constant in this example.)
The volume of gas increases because the
number of moles is increased. Similar to water filling a cup,
as long as there is space for the water (or gas) to fill up, it will
increase in volume.
- When pressure increases,
which variables should remain constant in order to observe an increase
in temperature? Mass and volume should remain
- Explain "Charles and Gay
- Lussac's Law."
With the pressure and number of moles held
constant in a sample of gas, turning off the burner and allowing the
gas to cool will produce a constant ratio of volume to temperature.
- Following this thinking,
if the volume of a given mass of gas is 5 cubic meters, what is the
If the gas had a volume of 5.0 cubic meters,
the temperature would be 375 degrees Kelvin.
- Which properties depend
on the amount of gas in the sample?
Extensive properties depend on the amount
- Which formula helps us find
the "specific volume" of a gas?
Volume divided by mass finds the "specific
- Which property of a gas
causes pressure within a container?
As the gas molecules collide with the walls
of a container, the molecules impart momentum to the walls, producing
a force that can be measured.
Propulsion Activity Index