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Understanding Gas Laws: Volume-Mass Relationships and Avogadro's Law

This text delves into the relationships between volume and mass in gases, focusing on Gay-Lussac’s Law and Avogadro's Law of Combining Volumes. It explains how at constant temperature and pressure, the volumes of gaseous reactants and products can be expressed as ratios of small whole numbers. Furthermore, it discusses the significance of the standard molar volume of gas at STP, approximated to 22.4 liters, and how this affects molecular mass differences among various gases. Overall, it provides a fundamental understanding of gas behavior in chemical reactions.

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Understanding Gas Laws: Volume-Mass Relationships and Avogadro's Law

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  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

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