Chapter 19 Avogadro’s Principle. Avogadro's Principle states that equal volumes of gases at the same temperature and pressure contain an equal number.

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Presentation transcript:

Chapter 19 Avogadro’s Principle

Avogadro's Principle states that equal volumes of gases at the same temperature and pressure contain an equal number of particles.

Avogadro’s Principle T = 0°C = 273K P = 1 atm = kPa = 760 torr 1 mol V = ? O2O2 CO 2 He 22.4L

The molar volume of a gas at STP L

1 mole of each gas at STP How many particles of gas are in each container? What would be the mass of each container? What would be the volume of each container? We now know three things about the mole. O2O2 CO 2 He

1 mole of each at STP How many particles of H 2 O are in each container? What would be the mass of each container? What would be the volume of each container? ice waterwater vapor

The molar volume of a at STP L gas

1 mole of each at STP How many particles of H 2 O are in each container? What would be the mass of each container? What would be the volume of each container? ice waterwater vapor

1 mole of each at STP How many particles of H 2 O are in each container? What would be the mass of each container? What would be the volume of each container? ice waterwater vapor

Mole Conversions

What is the volume of 200.0g of H 2 S gas at STP?

200.0g H 2 S =

What is the volume of 200.0g of H 2 S gas at STP? 200.0g H 2 S g

What is the volume of 200.0g of H 2 S gas at STP? 200.0g H 2 S mol g

What is the volume of 200.0g of H 2 S gas at STP? 200.0g H 2 S mol 34.1g

What is the volume of 200.0g of H 2 S gas at STP? 200.0g H 2 S mol 34.1g

What is the volume of 200.0g of H 2 S gas at STP? 200.0g H 2 S mol 34.1g mol

What is the volume of 200.0g of H 2 S gas at STP? 200.0g H 2 S mol L 34.1g mol

What is the volume of 200.0g of H 2 S gas at STP? 200.0g H 2 S mol 22.4L 34.1g mol

What is the volume of 200.0g of H 2 S gas at STP? L 200.0g H 2 S mol 22.4L 34.1g mol =

What is the mass of 14.7L of CO 2 at STP? 28.9 grams

How many molecules of CO 2 are in 14.7L of the gas at STP? 3.95 x molecules

How many atoms are in 14.7L of CO 2 gas at STP? 1.19 x atoms

Homework Summarize the (I) Purpose and (II) Procedure of the “Gas Laws” Lab. Study Guide Chapter 18. Worksheet: Combined Gas Law & Graham’s Law.  Mole-Volume Conversions Worksheet (due in two days).