14.1. Gas Properties http://www.ck12.org
FIGURE 14.4
This is a pressure vs. altitude curve that
displays altitude in kilometers on the left
axis and miles on the right. Pressure is
reported in millibars (mb) on the bottom
or inches of mercury (in Hg) on the top.Answer:
Looking at the altitude-pressure curve above, we can see that the pressure would be approximately 500 mb. Since the
pressure at sea level is 1000 mb, the new atmospheric pressure would be 500/1000×100% = 50% of the standard
atmospheric pressure.
Lesson Summary
- Gases assume the shape of their container.
- Gases are compressible.
- Gas particles demonstrate elastic collisions between themselves and with container walls.
- Pressure is equal to force/area.
- Atmospheric pressure can be measured with a barometer.
- Atmospheric pressure at sea level is 14.7 psi (1 atm) at 25°C.
- Atmospheric pressure decreases as the altitude increases.