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Introductory chemistry

Year 10 C Pathway Mr. D. Patterson. Introductory chemistry. Outcomes. Convert from moles to volume of a gas (and vice versa) at standard temperature and pressure Use the conversion of volume of a gas into moles (and vice versa) in stoichiometry problems. What affects the volume of a gas?.

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Introductory chemistry

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  1. Year 10 C Pathway Mr. D. Patterson Introductory chemistry

  2. Outcomes • Convert from moles to volume of a gas (and vice versa) at standard temperature and pressure • Use the conversion of volume of a gas into moles (and vice versa) in stoichiometry problems

  3. What affects the volume of a gas? • Equal volumes of gases at the same temperature and pressure have the same number of particles

  4. What affects the volume of a gas? • One mole of gas at standard temperature and pressure (STP) takes up 22.7 L • STP is at 0 oC and 100 kPa

  5. What affects the volume of a gas? • What would happen to the size of a balloon being pulled deep under the ocean? • What would happen to the size of a balloon floating high above the clouds?

  6. What affects the volume of a gas? • Increasing the outside pressure decreases the volume • Increasing the temperature increases the volume Decreasing external pressure

  7. How to calculate the volume of a gas n= number of moles of the gas V = volume of the gas (L) This equation only works at STP

  8. Example problem • A gas container holds 500ml of hydrogen gas at STP. How many moles of hydrogen gas is in the container?

  9. Example problem • 3 moles of oxygen is used to combust carbon at STP. What volume of oxygen is required?

  10. Using volume in Stoichiometry • Mass to moles • Moles to mass • Find moles of known • Find mass of unknown • Moles to Moles • Volume to moles • Moles to volume

  11. Example Problem • What volume of oxygen gas is required to produce 2 L of carbon dioxide gas when combusting methane? • Moles to Moles • Volume to moles • Moles to volume

  12. Example Problem • What volume of oxygen gas is required to produce 2 L of carbon dioxide gas when combusting methane? • Volume to moles

  13. Example Problem • What volume of oxygen gas is required to produce 2 L of carbon dioxide gas when combusting methane? • Moles to Moles

  14. Example Problem • What volume of oxygen gas is required to produce 2 L of carbon dioxide gas when combusting methane? • Moles to volume

  15. Outcomes • Convert from moles to volume of a gas (and vice versa) at standard temperature and pressure • Use the conversion of volume of a gas into moles (and vice versa) in stoichiometry problems • Checkpoint 11.3-11.9 • Sets 25-29

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