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Homework Help: Whats the materials specific heat capacity?

  1. May 13, 2003 #1

    Dx

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    Hello,

    150kcal of heat raises the temp of 2.0kg of material by 400 degrees F. Whats the materials specific heat capacity?

    I cam up with 1.35 kcal/kg degrees C. is this correct?

    Thanks!
    Dx :wink:
     
    Last edited by a moderator: Feb 4, 2013
  2. jcsd
  3. May 13, 2003 #2

    Tom Mattson

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    Dx,

    That's not what I get. Can you show me what you did?

    Thanks,
     
  4. May 13, 2003 #3

    Dx

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    I used some substitution

    No problem, Tom! I meant to say .34 kcal/fg oC was my answer sorry thats another problem i am working on but i got it wrong anyways, lol.

    I used the formula [del]Q = mc [del]T and substituted.
    c = 150kcal / (2kg)* (190oC) =
    .34 kcal

    i figured it was .34 since when i converted from F to C i rounded the number so then I usd scientific notation to conclude to this answer.
    I am sorry but I have reworked this problem many times erasing and adding to it so excuse me if its not exact but you can see I am really trying here.
    Thanks!
    Dx
     
  5. May 13, 2003 #4

    Tom Mattson

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    OK, that's what I got too.

    I was thinking you had made a mistake converting ΔTF to ΔTC (because you have to multiply by 5/9), but then I reworked the problem by making that mistake, and I still did not get your answer.

    Oh well, that's cleared up now.
     
  6. May 13, 2003 #5

    Dx

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    TY Tom

    Just wanted to say thanks!
     
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