Chapter 14 Chemistry Test Review Name: ________________________________________________ Period 1 2 3 4 5 6 7
Date ________________________________
1. Define the following:
A. Effusion
B. absolute zero
C. temperature
D. STP
E. Diffusion
2. If the pressure of a sample of oxygen gas is 1.30 atm determine its pressure in:
A. ____________________psi
B. ____________________mmHg
C. ____________________kPa
D. ____________________torr
3. Write the corresponding units for the ideal gas constant if the numerical value is:
A. 0.0821 ___________________________ B. 8.314 ________________________________ C. 62.4 ___________________________________
4. The Pressure on Mt Everest is 8.52 psi. Convert this to atmospheres
5. KMT means _________________________________________________
As the temperature of a gas increases, the gas molecules _________________________________
At T = 0.0 K what can be said about molecular motion? __________________________________________________
When molecules collide the collision is said to be ___________________________________________
Temperature provides a measurement of the average _______________ _________________ of molecules.
Any two gases at the same _____________________have the same kinetic energy.
6. Write the correct equation for each of the following
a. Dalton’s Law of Partial Pressures – b. Boyle’s Law-
c. Ideal Gas equation d. Gay-Lussac’s Law
e. Charles’ Law
7. A mixture of gases at 275oC contains He, Ne, Ar, propane (C3H8), hydrogen gas (H2 ) and carbon dioxide.
Which molecule will have the:
a. greatest average velocity -
b. slowest average velocity -
c. Which pair of molecules will have the same velocity- ____________ & ____________
8. What is the pressure of a gas mixture for which the partial pressure of nitrogen is 550 mm Hg, the partial pressure of oxygen is 20.5 kPa and the partial pressure of argon is 0.15 psi?
a. The answer in mm Hg is _________________
b. The answer in atm is _________________
9. Increasing the volume of a gas at constant temp causes the pressure to ________________
because________________________________________________________________________________________________________________________________________
When the temperature of a sample of gas in a fixed volume container is reduced, what happens to the pressure?
10. What variable is constant in all the gas laws except the Ideal Gas Law? _________________________________________
11. A gas at 360 K occupies a volume of 3.60 L. What volume will it occupy at 300 K?
12. The volume and amount of gas are constant in a tire. The initial pressure is 1.84 atm and the initial temperature is 300 K. At what temperature will the gas in the tire have a pressure of 2.08 atm? Give your answer in both Kelvin and Celsius.
.
13. A syringe containing 5.0mL of a gas has its pressure increased from 0.880 atm to 1.22 atm. What is the new volume of the syringe?
14. A sealed bag of cookies contains 258 mL of air at the store temperature of 25oC. It is left in a hot car where the temperature rises to 39oC. What will the volume be at this temp?
15. A balloon containing 555 mL of helium at 23oC and pressure is 744 mm Hg is released into the atmosphere.
When it stops rising, its volume has become 685 mL at a pressure of 444 mm. What is the temperature (in oC)?
16. If 12.3 g of O2 gas at 1.83 atm occupies a volume of 2.79 L, what must the temperature be ?
a. In Kelvin
b. In Celsius
17. A sample of helium occupies 10.0 L at 763 mm Hg and 25oC. What is the mass of the sample?