Units
What type of unit are the following: mL, L, kL, cm3?
Volume
What is evaporation?
The phase change from liquid to gas.
A 2 L container is initially at 14 atm. If the volume decreases to 1 L, what is the new pressure?
28 atm
Convert 32oF to Celsius.
0oC
Which of the following is an indirect relationship?
a. Pressure & # of particles
b. Pressure & Temperature
c. Pressure & Volume
d. Temperature & Kinetic Energy
c. Pressure & Volume
What type of unit are the following: K, oC, oF?
Temperature
What is sublimation?
The phase change from solid to gas.
A gas is initially at 82 mmHg at 172 K. After being cooled, the temperature is now 160 K. What is the resulting pressure?
76.28 mmHg
Convert 43oC to Kelvin.
316 K
If temperature is held constant while volume is decreased, what will happen to the pressure?
Pressure will increase.
What type of unit are the following: atm, torr, mmHg, Pa, kPa? (any of these may appear on the test)
Pressure
What is deposition?
The phase change from gas to solid.
There is a balloon at an unknown temperature with volume of 2.5L. After being heated, the volume is now 3.2L and temperature is 265 K. What was the initial temperature?
207.03 K
Convert 87 K to Celsius.
-186
Explain the difference between effusion and diffusion.
Effusion - The movement of a gas through a small hole within a container.
Diffusion - The spreading of particles from a higher concentration to a lower concentration.
What temperature unit should you convert to prior to doing a gas law calculation?
K (Kelvin)
What is temperature?
The average kinetic energy of particles in a substance.
A container is initially at -23 oC with a pressure of 146 torr. What is the resulting temperature (in Kelvin) if pressure increases to 252 torr?
431 K
Convert 83oF to Celsius.
28.33 oC
Under what conditions must a gas be to be considered "ideal"?
Low pressure & high temperature
What is 8.14 kPa in Pa?
8,140 Pa
What is thermal energy?
The total kinetic energy of particles in a substance.
A liter of gas is at 2 atm at 143 K. The volume expands to 3 L, and pressure decreases to 1.8 atm. What is the final temperature?
386.1 K
Convert 22 Kelvin to Fahrenheit.
-419.8 oF
A container made of latex is heated. As the container is heated, more particles are added to the container. Can we accurately determine the effect of the temperature increase on the internal pressure? Why or Why not?
No. Latex is flexible, so the volume will increase as it heats up. Also, adding particles will have an effect on internal pressure. Due to these confounding factors, we cannot draw accurate conclusions about the effect of heat on this container's internal pressure.