P, V, T
The temperature of a gas-filled balloon drops. What happens to the volume if pressure stays constant?
decreases
A balloon increases in size when left out in the sun.
Charles Law
Convert 60 torr to psi.
1.16 psi
True or False:
The more gas particles a gas has, the lower the pressure will be.
False
List 6 characteristics/behaviors of a gas.
(1) Gases expand to fill any container (2) Gases are fluids (3) Gases have very low densities; near zero (4) Gases can be compressed (5) Particles are in continuous, random motion (6) Collisions are elastic (7) Temperature is proportional to the kinetic energy of the particles (8) No forces of attraction occur between gas particles (9) Gases undergo effusion and diffusion.
True or False: If the pressure of a gas increases while temperature stays constant, the volume will increase.
False
If you leave an aerosol can in a hot car, the pressure inside increases, which may explode due to excessive pressure buildup.
Gay-Lussacs Law
A 2.5 L sample of hydrogen gas contains 0.14 moles. What volume will 0.25 moles occupy at the same temperature and pressure?
4.46 L
A scuba tank contains 75% oxygen and 25% helium at a total pressure of 350 torr. Find the partial pressure of O₂ and He.
262.5 torr = Oxygen
87.5 torr = Helium
Gay-Lussacs law tells that if pressure decreases, temperature will do what?
decrease
Volume is inversely proportional to pressure if temperature is constant.
Boyles Law
A gas occupies 8.0 L at 30°C . What will be its volume if the temperature drops to 25 °C?
7.87 L
DAILY DOUBLE!
How do gas particles create pressure?
Collisions of gas particles with walls of container.
A hair spray can is left in the sun. What happens to the pressure inside the can? What gas law is this?
(Must get both questions correct)
Increases. Gay-Lussacs Law
According to Dalton’s Law, the pressure a gas exerts depends on what?
the number of gas particles
A scientist measures the diffusion rates of Oxygen (O₂) and Argon (Ar). If oxygen diffuses at 30 mL/s, what is the diffusion rate of Argon?
26.85 mL/s
According to Graham's Law, which gas will diffuse the slowest?
Bromine
Neon
Nitrogen
Bromine
A container’s volume increases while temperature stays constant. Explain why pressure decreases using particle collisions.
pressure decreases because less collisions occur.
What does Avogadro's Law state?
The volume of a gas is directly proportional to the number of moles of gas.
A balloon is filled with 600 L of helium at sea level. The temperature is 15 °C. Calculate the volume of the balloon when if atmospheric pressure has decreased from 1 atm to 0.02 atm & temperature drops to 0 °C.
V2 = 28,438.31 L
Why are gases compressible?
Their volume is near zero/have a lot of empty space.