1 / 21

Gas Stoichiometry

Gas Stoichiometry. Random Thoughts. 1) We live immersed in a gaseous solution. Random Thoughts. We live immersed in a gaseous solution. 2) We live at the bottom of an ocean of air. Random Thoughts. We live immersed in a gaseous solution. 2) We live at the bottom of an ocean of air.

wnicolas
Download Presentation

Gas Stoichiometry

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. GasStoichiometry

  2. Random Thoughts 1) We live immersed in a gaseous solution.

  3. Random Thoughts • We live immersed in a gaseous solution. 2) We live at the bottom of an ocean of air.

  4. Random Thoughts • We live immersed in a gaseous solution. 2) We live at the bottom of an ocean of air. 3) Pressure goes from High to Low Demo: Low Budget Super soaker Jar with screen

  5. Pressure Defined • Pressure = Force / Area

  6. Pressure Defined • Pressure = Force / Area Demo: Nail Board & Cup Holder

  7. Pressure Defined 2) Number of collisions of gas molecules on its surroundings.

  8. Pressure Defined • Number of collisions of gas molecules on its surroundings. Demo: Drink Box Demo: Shrink Wrapping

  9. Pressure Defined • Really the result of the mass of air being pulled to the center of earth. Gravity

  10. Instrument that measures pressure: The Barometer - invented by Torricelli; often used mercury as liquid. --> We get a couple of units from this!

  11. The barometer High Pressure or Low? Pair? Pgas?

  12. The barometer Gas Inside High Pressure or Low? Outside Air pressure

  13. The barometer Gas Inside High Pressure or Low? Outside Air pressure Low pressure=> outside is losing the push vs the inside. Pgas = Pair + height difference

  14. The Barometer • High Pressure? Air would be pushing down harder. Pgas = Pair - height

  15. Lecture Problem-Barometer

  16. Standard Pressure ==> Units • 760 mmHg • 760 torrs • 101300 Pascals • 101.3 kPas • 1 atm • 14.7 lbs/in2 Show dimensional analysis

  17. Gas Law Problems: We have a problem with the gas molecule. Why is this a problem? • They show attraction! Can’t in Gas Law Problems • They take up space!!! Can’t in Gas Law Problems It’s our Physics problem: “Disregard air resistance” How do you do that?

  18. Real Gases • They do exist. • They can liquefy - condensation of vapor. • They don’t follow gas laws.

  19. Ideal Gases • They don’t exist. • They can’t liquiefy. • They follow the gas laws.

  20. So when do gases behave ideally so we can use them in our gas laws? Where they show no attraction to each other: What conditions would that be?

  21. So when do gases behave so we can use them in our gas laws? Ideally Where they show no attraction to each other: What conditions would that be? 1) Low pressures 2) High temperatures

More Related