logging in or signing up Gas laws rwbartelt Download Post to : URL : Related Presentations : Share Add to Flag Embed Email Send to Blogs and Networks Add to Channel Uploaded from authorPOINT lite Insert YouTube videos in PowerPont slides with aS Desktop Copy embed code: (To copy code, click on the text box) Embed: URL: Thumbnail: WordPress Embed Customize Embed The presentation is successfully added In Your Favorites. Views: 395 Category: Education License: All Rights Reserved Like it (0) Dislike it (0) Added: September 20, 2009 This Presentation is Public Favorites: 0 Presentation Description No description available. Comments Posting comment... Premium member Presentation Transcript 11.2 Gas Laws : 11.2 Gas Laws Chemistry Class Objectives : Objectives Define absolute zero Convert °C to °K Solve problems involving temperature, pressure, and volume changes Avogadro’s law : Avogadro’s law Avagadro found that for a gas at constant temperature and pressure, the volume is directly proportional to the number of moles of gas. This is written as Where V is volume and n is the number of moles, and a is a constant. Ramifications : Ramifications It may seem strange but all gasses occupy the same volume if they are under the same pressure and temperature. UF6 has a molar mass of over 300 g/mol yet a mole of it occupies the same volume as a mole of H2 which has a molar mass of just over 2 g/mol. How is this? Temperature : Temperature UF6 is big, but it still packs the same punch as little H2. This is due to the fact that at STP both molecules have the same KINETIC ENERGY. Temperature is the average kinetic energy of a particle in a system. UF6 H2 Kinetic energy : Kinetic energy Kinetic energy is related by the equation below KE=(1/2)MV2 M is mass, and V is velocity (speed) This means that a heavy molecule and a “light” molecule with the same kinetic energy will move at different speeds. Slide 7: If all five gases above are at STP in 22.4 L rigid containers which container has the greatest mass? I II III IV V All the same H2 F2 SO3 CH4 CO2 I II III IV V Slide 8: If all five gases above are at STP in 22.4 L rigid containers which gas has the greatest average speed? I II III IV V All the same H2 F2 SO3 CH4 CO2 I II III IV V Slide 9: If all five gases above are at STP in 22.4 L rigid containers which gas has the greatest average kinetic energy? I II III IV V All the same H2 F2 SO3 CH4 CO2 I II III IV V Slide 10: If all five gases above are at STP in 22.4 L rigid containers which container has the greatest number of molules? I II III IV V All the same H2 F2 SO3 CH4 CO2 I II III IV V Slide 11: If all five gases above are at STP in 22.4 L rigid containers which container has the greatest number of atoms? I II III IV V All the same H2 F2 SO3 CH4 CO2 I II III IV V Slide 12: If all five gases above are at STP in 22.4 L rigid containers which container has the greatest density? I II III IV V All the same H2 F2 SO3 CH4 CO2 I II III IV V Slide 13: If all five gases above are at STP in 22.4 L rigid containers which container’s molecules have the lowest average speed? I II III IV V All the same H2 F2 SO3 CH4 CO2 I II III IV V Slide 14: Indicate whether the average kinetic energy of the gas molecules in box I is greater than, less than, or equal to the average kinetic energy of the gas molecules in Box II. Justify your answer. NH3 0oC 1.0 atm PH3 0oC 2.0 atm Slide 15: Indicate whether the number of gas molecules in box I is greater than, less than, or equal to the of gas molecules in Box II. Assume both boxes are rigid and of equal volume. Justify your answer. NH3 0oC 1.0 atm PH3 0oC 2.0 atm Odyssey : Odyssey Now we will complete the lab activity that we started last Thursday Pull out the lab sheet and get ready to record some numbers. Absolute zero : Absolute zero Absolute zero is the lowest possible temperature that a material can reach. How does molecular motion relate temperature? What molecular motion would you predict at absolute zero? Absolute zero : Absolute zero At absolute zero there is no molecular motion. No substance can ever reach absolute zero. Why? Slide 20: Absolute Zero -273.15 °C Degrees Kelvin : Degrees Kelvin Absolute zero is defined as 0 degrees Kelvin (°K). To convert from °K to °C use the conversion factor below °K = °C + 273 Sample conversion : Sample conversion Convert 0 °C to °K Convert 84 °C to °K Convert -13 °C to °K Convert 84 °K to °C The ideal gas law : The ideal gas law We’ll look at the laws that we’ve studied so far: R is the gas constant You do not have the permission to view this presentation. In order to view it, please contact the author of the presentation.
Gas laws rwbartelt Download Post to : URL : Related Presentations : Share Add to Flag Embed Email Send to Blogs and Networks Add to Channel Uploaded from authorPOINT lite Insert YouTube videos in PowerPont slides with aS Desktop Copy embed code: (To copy code, click on the text box) Embed: URL: Thumbnail: WordPress Embed Customize Embed The presentation is successfully added In Your Favorites. Views: 395 Category: Education License: All Rights Reserved Like it (0) Dislike it (0) Added: September 20, 2009 This Presentation is Public Favorites: 0 Presentation Description No description available. Comments Posting comment... Premium member Presentation Transcript 11.2 Gas Laws : 11.2 Gas Laws Chemistry Class Objectives : Objectives Define absolute zero Convert °C to °K Solve problems involving temperature, pressure, and volume changes Avogadro’s law : Avogadro’s law Avagadro found that for a gas at constant temperature and pressure, the volume is directly proportional to the number of moles of gas. This is written as Where V is volume and n is the number of moles, and a is a constant. Ramifications : Ramifications It may seem strange but all gasses occupy the same volume if they are under the same pressure and temperature. UF6 has a molar mass of over 300 g/mol yet a mole of it occupies the same volume as a mole of H2 which has a molar mass of just over 2 g/mol. How is this? Temperature : Temperature UF6 is big, but it still packs the same punch as little H2. This is due to the fact that at STP both molecules have the same KINETIC ENERGY. Temperature is the average kinetic energy of a particle in a system. UF6 H2 Kinetic energy : Kinetic energy Kinetic energy is related by the equation below KE=(1/2)MV2 M is mass, and V is velocity (speed) This means that a heavy molecule and a “light” molecule with the same kinetic energy will move at different speeds. Slide 7: If all five gases above are at STP in 22.4 L rigid containers which container has the greatest mass? I II III IV V All the same H2 F2 SO3 CH4 CO2 I II III IV V Slide 8: If all five gases above are at STP in 22.4 L rigid containers which gas has the greatest average speed? I II III IV V All the same H2 F2 SO3 CH4 CO2 I II III IV V Slide 9: If all five gases above are at STP in 22.4 L rigid containers which gas has the greatest average kinetic energy? I II III IV V All the same H2 F2 SO3 CH4 CO2 I II III IV V Slide 10: If all five gases above are at STP in 22.4 L rigid containers which container has the greatest number of molules? I II III IV V All the same H2 F2 SO3 CH4 CO2 I II III IV V Slide 11: If all five gases above are at STP in 22.4 L rigid containers which container has the greatest number of atoms? I II III IV V All the same H2 F2 SO3 CH4 CO2 I II III IV V Slide 12: If all five gases above are at STP in 22.4 L rigid containers which container has the greatest density? I II III IV V All the same H2 F2 SO3 CH4 CO2 I II III IV V Slide 13: If all five gases above are at STP in 22.4 L rigid containers which container’s molecules have the lowest average speed? I II III IV V All the same H2 F2 SO3 CH4 CO2 I II III IV V Slide 14: Indicate whether the average kinetic energy of the gas molecules in box I is greater than, less than, or equal to the average kinetic energy of the gas molecules in Box II. Justify your answer. NH3 0oC 1.0 atm PH3 0oC 2.0 atm Slide 15: Indicate whether the number of gas molecules in box I is greater than, less than, or equal to the of gas molecules in Box II. Assume both boxes are rigid and of equal volume. Justify your answer. NH3 0oC 1.0 atm PH3 0oC 2.0 atm Odyssey : Odyssey Now we will complete the lab activity that we started last Thursday Pull out the lab sheet and get ready to record some numbers. Absolute zero : Absolute zero Absolute zero is the lowest possible temperature that a material can reach. How does molecular motion relate temperature? What molecular motion would you predict at absolute zero? Absolute zero : Absolute zero At absolute zero there is no molecular motion. No substance can ever reach absolute zero. Why? Slide 20: Absolute Zero -273.15 °C Degrees Kelvin : Degrees Kelvin Absolute zero is defined as 0 degrees Kelvin (°K). To convert from °K to °C use the conversion factor below °K = °C + 273 Sample conversion : Sample conversion Convert 0 °C to °K Convert 84 °C to °K Convert -13 °C to °K Convert 84 °K to °C The ideal gas law : The ideal gas law We’ll look at the laws that we’ve studied so far: R is the gas constant