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iheartfood Group Title

#1: The average velocities of gas molecules in cylinders A, B, C, and D are 20 m/s, 50 m/s, 60 m/s, and 100 m/s, respectively. The volume of each cylinder is the same, and each has the same number of moles of gas. Which cylinder is the hottest? A,B,C or D? **my answer: D is that right? @aaronq :)

  • one year ago
  • one year ago

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  1. aaronq Group Title
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    yep, average kinetic energy = temperature

    • one year ago
  2. iheartfood Group Title
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    #2: You have 0.5 L of air at a pressure of 203 kPa and 70°C in a rigid, sealed container. What is the absolute temperature of the air? A. - 70 K B. 70 K C. 203 K D. 273 K **my answer: C is that right?

    • one year ago
  3. iheartfood Group Title
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    awesome! so #1 is right? it's D?

    • one year ago
  4. iheartfood Group Title
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    #3: At which of the following temperatures is the average kinetic energy of the molecules in one liter of nitrogen gas greatest? A. 40°C B. 273 K C. 310 K D. 60°C **my answer: B. 273 K is that right?? I'm not too entirely sure tho :/

    • one year ago
  5. aaronq Group Title
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    what do they mean by absolute temperature? because it doesn't seem like the mean the kelvin scale

    • one year ago
  6. iheartfood Group Title
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    i honestly don't know!! Hahha it just says absolute temperature....i think it means kelvin tho.. idk :/

    • one year ago
  7. iheartfood Group Title
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    #4: At 52°C, the pressure inside a gas-filled container is 467 kPa. What is the absolute temperature of the gas? A. 163 K B. 325 K C. 335 K D. 651 K **my answer: B. 325 K

    • one year ago
  8. aaronq Group Title
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    #3 is asking which temp is the highest

    • one year ago
  9. iheartfood Group Title
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    i think they mean kelvin cuz in chem they refer to it as abs. temp a lot.. and kelvin appears A LOTT in my lessons :/

    • one year ago
  10. iheartfood Group Title
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    oh so would #3 be D. 60°C??

    • one year ago
  11. aaronq Group Title
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    no well i know that kelvin is the absolute temp scale :P

    • one year ago
  12. iheartfood Group Title
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    #5: choose the statement that is true at room temperature if both systems are at the same pressure and volume according to the pic attached!

    • one year ago
  13. iheartfood Group Title
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    A. The temperature of the system in curve A is greater than the temperature of the system in curve B. B. The temperature of the system in curve B is greater than the temperature of the system in curve A. C. The temperature of the system in curve A is equal to the temperature of the system in curve B. ***my answer: A is that right?

    • one year ago
  14. aaronq Group Title
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    i think they want it scaled in regards to pressure...

    • one year ago
  15. aaronq Group Title
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    yep 3 is C

    • one year ago
  16. aaronq Group Title
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    4 is right, but 2 still doesn't make sense, none of the options are correct..

    • one year ago
  17. iheartfood Group Title
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    wait so #3 is C. 310 K ??? and yay for 4! and aww :( idk then.. what do u think about #2 then? and was 1 correct?

    • one year ago
  18. aaronq Group Title
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    5 is incorrect.. you're getting mixed up with the graph by it just being taller. Look at the axes. you know that speed is proportional to temperature, i.e. the faster the molecules the greater the temp

    • one year ago
  19. iheartfood Group Title
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    so the answer for 5 is B ten?

    • one year ago
  20. iheartfood Group Title
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    *then lol

    • one year ago
  21. aaronq Group Title
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    sorry i meant 3 is D, 333 Klvin

    • one year ago
  22. aaronq Group Title
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    1 was good

    • one year ago
  23. iheartfood Group Title
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    okay! :)

    • one year ago
  24. aaronq Group Title
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    for 2, i honestly don't know, none of the choices given make any sense

    • one year ago
  25. iheartfood Group Title
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    ohh :( okay... what would u go with as ur guess tho?? for #2? and what was 5 then? was it B?

    • one year ago
  26. aaronq Group Title
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    um for 2, i honestly can't say one is more right then the other haha sorry :( for 5, maybe, why do you think so?

    • one year ago
  27. iheartfood Group Title
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    okay haha ill have to wing #2 :P and 5 i think cuz A drops REALLYYY fast right? but B is constant and the curve elongates more... am i right?? is the answer B?

    • one year ago
  28. aaronq Group Title
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    um it's B, not those aren't reasons :P basically, because B is farther right on the "speed" axis, that tells you that it has higher kinetic energy and therefore higher temperature, ta-da

    • one year ago
  29. iheartfood Group Title
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    hahah i seee :) lol and i liked the ta-da thing at the end :P

    • one year ago
  30. aaronq Group Title
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    the elongation part if just the distribution of speed of the molecules, more narrow bands have smaller distributions (particles are only within a small temperature range e.g. 20-30 degrees) longer distributions (like B) say that the range of temp of the particles is large, e.g. 10-60 degrees

    • one year ago
  31. aaronq Group Title
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    hahaha woo :) sometimes it's like magic, chemistry

    • one year ago
  32. iheartfood Group Title
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    ohh okay haha thanks sooooo muchh!!!! :) u da besttt :) u rock and you rule!! :) haha and i know its like magic!

    • one year ago
  33. aaronq Group Title
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    LOL that picture is awesome!... but corny thanks! see ya

    • one year ago
  34. iheartfood Group Title
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    haha definitely! see ya!! Thanks again :)

    • one year ago
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