Chapter 11b Ideal Gas Laws Chapter 11b Ideal Gas Laws

When pressure, volume, and temperature are known, the ideal gas law can be used to

calculate

•molar amount

Calculate the approximate volume of a 0.600 mol

sample of gas at 15.0°C and a pressure of 1.10 atm

V = nRT P0.600mol * 0.0821 (15.0°C +273) = 12.9 L 1.10 atm

True or falseTrue or false

• John Dalton developed the concept that the total pressure of a mixture of gases is the sum of their partial pressures?

• John Dalton developed the concept that the total pressure of a mixture of gases is the sum of their partial pressures?

True

Who developed the Law that states that equal volumes of gas at the same pressure and temp. contain equal

numbers of moles?

Avogadro

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

because it

diffuses

True or falseTrue or false

• The law of combining volumes applies only to gas volumes measured at constant temperature and pressure.

• The law of combining volumes applies only to gas volumes measured at constant temperature and pressure.

True

The odor of perfume spreading throughout a room is an example

of

gas diffusion

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 * 0.0821 * (273K) = 43.0g/mol 1.00 atm * 1.00 L

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.

Knowing the mass and volume of a gas at STP allows one to

calculate the

molar mass of the gas

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

Avogadro

Problem solving problem will come directly from the

practice sheet

•If you know it you will do just fine!!!

The End!The End!The End!The End!The End!The End!