A community for students.

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

anonymous

  • 5 years ago

Choose the correct statement below regarding heat and temperature. The temperature of an object is related to its kinetic energy - increasing the temperature increases the mass in the kinetic energy equation. Heat is energy that is transferred between objects. Only kinetic energy can be transformed into heat energy. When a hot object is placed in contact with a cold object, it loses heat until it reaches the temperature of that cold object.

  • This Question is Closed
  1. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    y do u hate me

  2. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    What? who says I hate you.

  3. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    u

  4. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    the last one's true...

  5. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    You sure? This is a quiz so I can't get it wrong.

  6. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    I love you AngelDreamGurl <3 How can someone hate an angel, tell me now?

  7. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    But the last statement does make sense,

  8. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    glad we agree :) and yeah - i'm pretty sure... -> http://en.wikipedia.org/wiki/Conduction_%28heat%29

  9. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    That was wrong. It's the second one

  10. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    :'(

  11. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Do you know this one? Which statement is true? Molecules in gases possess kinetic energy since they are in constant motion, while molecules in liquids and solids are not in constant motion and hence possess no kinetic energy. Molecules in gases and liquids possess kinetic energy since they are in constant motion, while molecules in solids are not in constant motion and hence possess no kinetic energy. Polyatomic molecules possess kinetic energy in the liquid and gaseous states since the atoms can move about in the molecule even if the molecule cannot move. Since solids are rigid, their molecules do not possess kinetic energy unless the solid is melted. Molecules in gases, liquids and solids possess kinetic energy since they are in constant motion.

  12. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    mah - flutter this quiz! The last statement is as true as the second! (sry - i thought 'heat' was a synonym for 'thermal energy')... It's just guessing what the guy phrasing the questions was thinking .. and apparently he wanted you to know, that the energy is not rly 'lost' but transferred. But how the **** should we was thinking about the word 'lose' in exactly this way..? argh :-/

  13. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    And about the second question: I _swear_ the last one is true!

  14. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Yep... :)

  15. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    When pure sodium hydroxide is dissolved in water, heat is evolved. In a laboratory experiment to measure the molar heat of solution of sodium hydroxide, the following procedure was followed. To a calorimeter containing 3.00 × 102 g of water at 20.00 °C, 10.65 g of NaOH, also at 20.00 °C was added. The temperature change, which was monitored by a digital thermometer with negligible heat capacity, stopped when it reached a temperature of 28.50 °C. If the specific heat of the mixture is 4.184 J g-1°C1, and the small heat capacity of the calorimeter is ignored, what is the heat evolved, per mole of sodium hydroxide?

  16. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Ur still typing. Appreciate the help :)

  17. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    ahm... so you got 306g water + 10.65g NaOH = 316.65g of mixture @ 20°C and then later @ 28.5°C...\[\Delta T = 8.5°\] the "specific heat capacity" (hope that's the correct name) c is given with 4.184 J g^-11 °C^-1 (should be in J kg^-1 K^-1 but whatever) \[\Delta Q = c*m*\Delta T = 4.184 * 316.65 * 8.5 = 11261.3 J\] so about 11.3 kJ for that 10.65g of NaOH. NaOH should be 23+16+1 = 40 g/mol, so we are looking at 10.65/40 = 0.27 mol And therefore, 1 mol of NaOH would give you about 11.3kJ/0.26mol = 42.3 kJ/mol of heat. yeah I am ^^ hope, it's correct - better calculate it again for yourself, cause apparently i'm having a bad day ;)

  18. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    These are the choices I have. -41.5 kJ -45.5 kJ -90.5 kJ -37.4 kJ -153 kJ

  19. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    argh.. so.. let's plug in the exact numbers and see what we get ^^

  20. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    \[(4.184*316.65*8.5) / (10.65/40) = 42296.11492957746\]

  21. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    That would round up to be?

  22. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    it's 42.3 again - and i honestly have no clue what the guy makin the quiz was thinking, cause that's definitely the correct answer ( i think ^^)... Cant find an error on my side, so - it's your choice - guess what he was doing :P (we are closer to 41.5 - but I wouldnt bet on it - maybe he just divided by 0.25.. you'd already be at 45 with that...)

  23. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    The professor is a flutterin idiot. All the quizzes have been like this.

  24. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    So 42.3?

  25. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    yeah - but I could've made a mistake, too... Best thing to do, would be, u go over it step by step again and double-check everything.. hopefully you find the error, if there is one.

  26. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    All right. Do you know this? For a chemical reaction taking place at constant pressure in which all reactants and products are solids or liquids, ΔE ≈ qp. Is it True or False?

  27. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    sry, i dont know - what's 'q' ? and what's 'p' ?

  28. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    q is the change in heat

  29. Not the answer you are looking for?
    Search for more explanations.

    • Attachments:

Ask your own question

Sign Up
Find more explanations on OpenStudy
Privacy Policy

Your question is ready. Sign up for free to start getting answers.

spraguer (Moderator)
5 → View Detailed Profile

is replying to Can someone tell me what button the professor is hitting...

23

  • Teamwork 19 Teammate
  • Problem Solving 19 Hero
  • You have blocked this person.
  • ✔ You're a fan Checking fan status...

Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.

This is the testimonial you wrote.
You haven't written a testimonial for Owlfred.