Volume-Mass Relationships

1. Volume-Mass Relationships Gay-Lussac’s A. ___________ Law of Combining ________of Gases states that at constant temperature and pressure, the _______ of gaseous reactants and products can be expressed as _____ of small whole numbers. Volumes volume ratios

2. Volume-Mass Relationships 2H2 (g) + O2 (g) (g) 2H2O

3. Volume-Mass Relationships 2H2 (g) + O2 (g) (g) 2H2O

4. Volume-Mass Relationships 2H2 (g) + O2 (g) (g) 2H2O

5. Volume-Mass Relationships B. _________ Law states that equal _______ of gases at the same ___________ and ________ contain equal numbers of _________. Avogadro’s volumes temperature pressure molecules

6. Volume-Mass Relationships H2 (g) O2 (g)

7. Volume-Mass Relationships

8. Volume-Mass Relationships 1. Mathematically, Avogadro’s law is expressed as follows: V n k=

9. Volume-Mass Relationships 2. Avogadro’s law can be used to compare changing conditions as follows: V1 n1 V2 n2 =

10. Volume-Mass Relationships C. The volume occupied by one mole of a gas at STP is known as the _______ _____ _______ of a ___. It has been found to be approximately _____. standard molar volume gas 22.4L

11. Volume-Mass Relationships 22.4Liters = 1 mol of at STP gas

12. Volume-Mass Relationships 1. The following conversion factors can be written for the standard molar volume of a gas: 1 mol 22.4L 22.4L 1 mol

13. Volume-Mass Relationships 2. Even though the number of molecules will be the same for a mole of any gas at STP, the ____ of this volume is different for different gases. mass

14. Volume-Mass Relationships H2 (g) O2 (g)

15. Volume-Mass Relationships 3. Remember STP is ___ and _____. 0°C 1atm