# Chapter 11b Ideal Gas Laws - PowerPoint PPT Presentation

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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 P

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Chapter 11b Ideal Gas Laws

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Chapter 11b Ideal Gas Laws

• 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

• P

• 0.600mol * 0.0821 (15.0°C +273) = 12.9 L

• 1.10 atm

### 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

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

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

• diffuses

### True or false

• 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.

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