Directions: Read each item carefully and select the letter of the best answer. Flask Flask 3 Flask 2 Flask 4 1. Each of these flasks contains the same number of molecules of gas at the same temperature. In which container is the pressure lowest? A. Flask 1 B. Flask 2 C. Flask 3 D. Flask 4 1 atm 2 atm a atm 4 atm Flasa1 Flask 2 Flask 3 Flask 4 2. Each of these flasks is the same size and at the same temperature. Which of the following statement is truc? A Flask 1 contains the fewest molecules. B. Flasks 2 and 3 contains fewest molecules. C. Flask 4 D. All 4 flasiks contain equel number of molecules. contains the fewest molecules. 3. Which of the folowing samples of gas will bave the greatest preesure il they all have the same volume? A 10 moles at 80 C C. 10 moles at 70 °C D. 2 moles at 82 °C B. 5 moles at 81 C 4. In which condirion cen real gaa obey closely the ideal gas equation? A. preseure is very small and temperature is very high pressure is very high and temperature is very low
Ideal and Real Gases
Ideal gases obey conditions of the general gas laws under all states of pressure and temperature. Ideal gases are also named perfect gases. The attributes of ideal gases are as follows,
Gas Laws
Gas laws describe the ways in which volume, temperature, pressure, and other conditions correlate when matter is in a gaseous state. The very first observations about the physical properties of gases was made by Robert Boyle in 1662. Later discoveries were made by Charles, Gay-Lussac, Avogadro, and others. Eventually, these observations were combined to produce the ideal gas law.
Gaseous State
It is well known that matter exists in different forms in our surroundings. There are five known states of matter, such as solids, gases, liquids, plasma and Bose-Einstein condensate. The last two are known newly in the recent days. Thus, the detailed forms of matter studied are solids, gases and liquids. The best example of a substance that is present in different states is water. It is solid ice, gaseous vapor or steam and liquid water depending on the temperature and pressure conditions. This is due to the difference in the intermolecular forces and distances. The occurrence of three different phases is due to the difference in the two major forces, the force which tends to tightly hold molecules i.e., forces of attraction and the disruptive forces obtained from the thermal energy of molecules.
![Directions: Read each item carefully and select the letter of the best answer.
Flask 1
Flask 2
Flask 3
Flask 4
1. Each of these flasks contains the same number of molecules of gas at the
same temperature. In which container is the pressure lowest?
A. Flask 1
B. Flask 2
C. Flask 3
D. Flaske &
a atm
4 atm
Flas 1
Flask 2
Flask 3
Flask 4
2. Euch of these flasks is the same size and at the same temperature.
Which of the following statement is true?
A. Flask 1 contains the fewest molecules.
B. Flasks 2 and 3 contains fewest molecules.
C. Flask 4 contains the fewest molecules.
D. All 4 flasks contain equal number of molecules.
3. Which of the foilowing samples of gas will bave the greatest pressure if
they all have the same volume?
A 10 moles at 80 C
B. 5 moles at 81 C
C. 10 moles at 7o °C
D. 2 moles at 82 °C
4. In which condition cen real gaa obey closely the ideal gas equation?
A. pressure is very small and temperature is very high
B. preasure is very high and temperature is very low
C. both pressure and temperature are very high
D. both pressure and temperature are very low
5. If there are three ideal gas in a scaled container with known partial
pressure, temperature and volume, what additional information is
needed to determine the masses of the gases in the container?
A. the intermolecular forces
B. the volume of the gas molecules
C. the total pressure
D. the molar messes of the gases
6. The volume of a real gas might be larger than from the caleulated volume
of an ideal gas equation. This is because the ideal gas equation does NOT
consider the
A. Attraction
B. shane of
A. Attraction between molecules
shape of the molecules
C. vohame of the molecules
D. mass of the molecules
7. In the problem given, the pressure, volume, moles (n) and the constant
(R) are given. Which equation should you used to find the temperature?
A. T-PVn/R
B. T- PV/nR
C. T- nR/PV
D. T- PVNR
8. In the problem given, the volume, moles (n), temperature and the
constant (R) are given. Which equation should you used to find the
pressure?
A. P- TV/nR
B. P-TVnR
C. P-V/nRT
D. PnRT/y
9. You were given the following information: pressure, moles (n).
temperature and the constant (R). What equation would yau use to find
the volume?
A. V-PNRT
B. V-Pn/RT
C. V-P/nRT
D. V-nRT/P
10.
temperature and the constant (R). What equation would you use to find
the moles (n)?
You were given the following information: volume, pressure,
A. n-RT/PV
B. n-PVRT
C. n-PV/RT
D. n-PRT/V
What volume does one mole of gas occupies at 1 atm and 273
11.
kelvin?
A. 1.00 liters
B. 22.4 liters
What is the density of an Argon gas at a temperature of 80.8 C
C. 273 liters
D. 6.02 X 10 23 liters
12.
and e pressure of 1.29 atm?
4
A. 51.6 g/L
B. 1.2 g/L.
с. 1.78 к/L
D. 1.0 g/L.
13.
What volume does a 5.24 grams of carbon dioxide gas occupies at
STP?
A. 1.19L
B. 2.69 L
C. 5. 24 L
D. 22.4 L
If one mole of an ideal gas has a pressure of 760 mmig, a
temperature of OC and a volume of 22.4 L, what is the value of the gas
constant IRI?
A. 0.08206 L'mmHg/mol*K
B. 0.08206 L'atm/molC
C. 62.36 L*mmHg/mol*C
D. 62.36 L'atm/mol'K
14.
15.
An ideal gas has ALL. of the following characteristics except.
A. Elastic collision
B. Molecules occupied negligible volume
C. Lack intermolecular forces between gas molecules exist
D. Exert small intermolecular forces between gas molecules](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F716bd1d4-9e2f-4f14-9c90-daa7c2441817%2Ff42757b2-ebad-4373-8ea3-160e8dd7bed6%2Fgitaz9_processed.jpeg&w=3840&q=75)
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