1. Chapter 11b Ideal Gas Laws

2. When pressure, volume, and temperature are known, the ideal gas law can be used to calculate
molar amount

3. Calculate the approximate volume of a 0. 600 mol sample of gas at 15
Calculate the approximate volume of a mol sample of gas at 15.0°C and a pressure of 1.10 atm
V = nRT P
0.600mol * (15.0°C +273) = 12.9 L
1.10 atm

4. True or false
John Dalton developed the concept that the total pressure of a mixture of gases is the sum of their partial pressures?
True

5. Who developed the Law that states that equal volumes of gas at the same pressure and temp. contain equal numbers of moles?
Avogadro

6. If a gas with an odor is released in a room, it quickly can be detected across the room because it
diffuses

7. True or false
The law of combining volumes applies only to gas volumes measured at constant temperature and pressure.
True

8. The odor of perfume spreading throughout a room is an example of
gas diffusion

9. A 1. 00 L sample of a gas has a mass of 1. 92 g at STP
A 1.00 L sample of a gas has a mass of 1.92 g at STP. What is the molar mass of the gas?
molar mass = grams * RT PV
1.92g * * (273K) = 43.0g/mol atm * L

10. If two gases are both measured at 725 ˚C and 5
If two gases are both measured at 725 ˚C and 5.05 atm, what volume of N2 (g) can be produced from the decomposition of 37.6 L of NH3 (g)?
37.6 L
Avogadro’s law: equal volumes of gas contain equal numbers of moles at the same pressure and temp.

11. Knowing the mass and volume of a gas at STP allows one to calculate the
molar mass of the gas

12. The principle that under similar pressures and temperatures, equal volumes of gases contain the same number of molecules is attributed to
Avogadro

13. Problem solving problem will come directly from the practice sheet
If you know it you will do just fine!!!

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