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faby9898

  • 3 years ago

how much thermal energy is LOST while cooling a 10g block of aluminum form 120 celcius to 80 celcious

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  1. Algebraic!
    • 3 years ago
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    \[\Delta Q = m*c*\Delta T\]

  2. Algebraic!
    • 3 years ago
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    locate c, the specific heat of aluminum, on a table... use units for mass that agree with the units of the value you have for specific heat...

  3. faby9898
    • 3 years ago
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    is the specific heat for aluminum 0.920 J/(g c)? is that what ur asking for?

  4. Algebraic!
    • 3 years ago
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    sure.

  5. Algebraic!
    • 3 years ago
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    do you want me to google that in order to verify that it's the correct value or something?

  6. faby9898
    • 3 years ago
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    ok so i take that and i multiply it by the mass which is 10g but how do i find the delta t?

  7. Algebraic!
    • 3 years ago
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    from 120 to 80 is a change of?

  8. faby9898
    • 3 years ago
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    and if u want u can google it i have it on my homework worksheet though

  9. faby9898
    • 3 years ago
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    40 degrees

  10. Algebraic!
    • 3 years ago
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    +40?

  11. faby9898
    • 3 years ago
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    i think so

  12. Algebraic!
    • 3 years ago
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    if you had 6 twenties in your wallet and then you checked again in a few minutes and you only had 4 twenties, what happened?

  13. Algebraic!
    • 3 years ago
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    you lost 40 dollars

  14. Algebraic!
    • 3 years ago
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    120 -> 80 is a change of -40

  15. faby9898
    • 3 years ago
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    so it would be negative 40?

  16. Algebraic!
    • 3 years ago
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    yes:)

  17. faby9898
    • 3 years ago
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    ok so the formula would be 5*0.920J*-40 then i would get my answer?

  18. Algebraic!
    • 3 years ago
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    it's 10 grams

  19. faby9898
    • 3 years ago
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    oh sorry i was looking at the wrong problem lol

  20. faby9898
    • 3 years ago
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    so its -368 J

  21. Algebraic!
    • 3 years ago
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    sure but the question asks how much heat is lost... so if I asked you how much money you lost in the earlier example... what would you say?

  22. Algebraic!
    • 3 years ago
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    -40 dollars? or 40 dollars?

  23. faby9898
    • 3 years ago
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    negative 40

  24. Algebraic!
    • 3 years ago
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    "I lost negative forty dollars" does anyone ever say that?

  25. Algebraic!
    • 3 years ago
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    "lost" means "negative".

  26. faby9898
    • 3 years ago
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    no lol so we would say we lost 40 thermal energy?

  27. Algebraic!
    • 3 years ago
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    temperature decreased -> heat was lost.... delta T is negative delta Q is negative delta Q = -386 J means 386 J was lost

  28. faby9898
    • 3 years ago
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    oooh ok thank you!!!

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