The Molar Volume of Gases .

Guidance re calculating the volume of gases based on the number of moles present.

1. 3.3 The Molar Volume Pages 132- 141

2. Gay Lussas and Amadeo Avogadro found out that equal volumes of different gases , measured at the same temperature and pressure have equal number of particles MOLAR VOLUME

3. Temperature: 273.15K or 0ºC Pressure: 101.3kPa or 1 atm Standard Temperature and Pressure (STP)

4. Volume occupied by one mole of the gas at STP MOLAR VOLUME

5. Volume occupied by one mole of any gas at STP MOLAR VOLUME Volume occupied by 6.02 x 10 23 particles of any gas at STP

6. OR in other words, 1 mol of any gas at STP has a volume of 22.4 L The volume of 1 mol of any gas at STP is 22.4 L

7. Volume occupied by one mole of any gas at STP MOLAR VOLUME It only applies to: Gases Only at STP

8. Two – step conversion: Volume of Ne to mol of Ne Mol of Ne to Number of atoms of Ne 2 1

9. Two – step conversion: Volume of CH 4 to mol of CH 4 Mol of CH 4 to grams of CH 4 2 1

10. What volume of CO 2 at STP contains 0.20g of C ? CO 2 C Grams of C to mol of C Mol of C to mol of CO 2 Mol of CO 2 to litres of CO 2

11. Density = amount of matter in a given volume MOLAR VOLUME and DENSITY Using units for molar volume and molar mass , Try to come up with a formula that relates them to density

12. Density = amount of matter in a given volume MOLAR VOLUME and DENSITY Using units for molar volume and molar mass , Try to come up with a formula that relates them to density

13. 3.4 Review Problems (page 140 – 141 ): all even 3.4 QUIZ, Wednesday, April 16 Classwork /Homework