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Lead and calorimetry

  1. Nov 22, 2005 #1
    i need help answering some chemistry questions..and i need these answers asap.

    1. I need three reasons why the specific heat of lead is so hard to find?

    and the second is
    2. Three reasons why an error could have occured in our calorimetry lab?

    Thank you
    chemistrygirl09:smile:
     
  2. jcsd
  3. Nov 22, 2005 #2

    mezarashi

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    Wouldn't you think that the second question is a bit unreasonable to ask given that we did not do your calorimetry lab?
     
  4. Nov 22, 2005 #3
    problem

    i did do the lab but i got a 400 percent error, due to my partner and i doing the lab wrong. and so i need to figure ou thtese questions..but i did do the lab...sorry i should have been more specific.
     
  5. Nov 22, 2005 #4

    Pengwuino

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    Well to answer #2..

    determine three reasons why an error could have occured in your calorimetry lab.

    I mean we really have no idea what you did and since you were there, you should know what you did wrong.
     
  6. Nov 22, 2005 #5
    can anyone answer my question to number one thats all i need right now..cuz i really have to get to studying...plz hurry
     
  7. Nov 23, 2005 #6

    mezarashi

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    I don't think PF is an appropriate place to find 'quick answers' to homework problems although a homework section is present. Along with the fact that the help provided here are considered 'suggested solutions', there is no guarantee that they are always correct. If you expect otherwise, there is a high chance you will be disappointed.

    To your first question: I don't know of any fundamental reason why it should be. Looking up the tables, the only interesting thing to note is that lead has a very small specific heat ~ 129 J/kgC compared to liquid water which is 4186 J/kgC. Calorimetry is usually done by dipping hot metals into a known volume of water and measuring the temperature change. If the specific heat is small, the change in temperature may be hard to notice.
     
  8. Nov 23, 2005 #7

    Gokul43201

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    This is NOT a place where you can ask others to do your homework for you - you have to show some effort first. Please read the sticky at the top of this forum to see the rules that you agreed to before entering. These are also found in the second line of my signature.
     
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