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**Chapter 11b Ideal Gas Laws**

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

molar amount

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**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

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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

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

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

diffuses

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

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**The odor of perfume spreading throughout a room is an example of**

gas diffusion

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**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

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**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.

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

molar mass of the gas

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

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**Problem solving problem will come directly from the practice sheet**

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

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

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