1 / 7

AP Chemistry Unit 5 – States of Matter

AP Chemistry Unit 5 – States of Matter. Lesson 7 – Gas Stoichiometry Book Section: 10.5. Gas Reactions. Avogadro’s Hypothesis – the volume of any gas is proportional to its volume. This means that in any reaction, volumes of gas can be treated just like moles. Gas Reactions.

erich-hester
Download Presentation

AP Chemistry Unit 5 – States of Matter

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. AP ChemistryUnit 5 – States of Matter Lesson 7 – Gas Stoichiometry Book Section: 10.5

  2. Gas Reactions • Avogadro’s Hypothesis – the volume of any gas is proportional to its volume. • This means that in any reaction, volumes of gas can be treated just like moles.

  3. Gas Reactions • N2 + 3H2 2NH3 • If you have 2 moles of N2, you can make 4 moles of NH3. • If you have 2 liters of N2, you can make 4 liters of NH3.

  4. Molar Volume • At standard temperature and pressure (STP) – 298 K, 1 atm, one mole of gas is equal to 22.4 L. • This is a very common conversion factor in gas stoichiometry. • At STP, 1 mol = 22.4 L

  5. Sample Gas Stoichiometry Problem • The safety bags in automobiles are inflated by nitrogen gas generated by the rapid decomposition of sodium azide, NaN3: 2 NaN3(s) 2 Na(s) + 3 N2(g) • If an air bag has a volume of 36 L and is to be filled with nitrogen gas at a pressure of 1.15 atm at a temperature of 26.0 ºC, how many grams of NaN3 must be decomposed?

  6. Sample Gas Stoichiometry Problem • The safety bags in automobiles are inflated by nitrogen gas generated by the rapid decomposition of sodium azide, NaN3: 2 NaN3(s) 2 Na(s) + 3 N2(g) • If an air bag has a volume of 36 L and is to be filled with nitrogen gas at a pressure of 1.15 atm at a temperature of 26.0 ºC, how many grams of NaN3 must be decomposed? • Answer: 72 grams

  7. Homework: 10.46, 10.48, 10.50, 10.52, 10.54, 10.56 • Next week: • Monday: Intermolecular Forces (11.1-11.2, 11.8) • Tuesday: Molar Mass of a Condensable Vapor Lab • Due Dates: • Volume-Temperature Behavior of Gases: 11/30 • States of Matter Exam: Monday, 12/6 • Molar Mass of Condensable Vapor: 12/8 • Problem Set 4: 12/10

More Related