1. Not finding help here? Sign up for a free 30min tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

HELP Thermodynamics question

  1. Jun 26, 2011 #1
    HELP!!! Thermodynamics question

    1. The problem statement, all variables and given/known data
    Which would you chose between paraffin & wood to make heat storage? Why?
    specific heat of paraffin = 2900 J/kgC
    specific heat of wood = 1750 J/KgC


    2. The attempt at a solution

    They say that the answer is paraffin but I don't know why. Could anyone help me to deal with this problem?
     
  2. jcsd
  3. Jun 26, 2011 #2

    Andrew Mason

    User Avatar
    Science Advisor
    Homework Helper

    Re: HELP!!! Thermodynamics question

    For effective heat storage you want the temperature of the substance to decline as slowly as possible as heat is removed.

    Paraffin is also good because it has a very high latent heat of fusion, so if you heat it above its melting point it will stay at same temperature (ie its melting point) for a long time as the heat flows out of it.

    AM
     
  4. Jun 30, 2011 #3
    Re: HELP!!! Thermodynamics question

    Thank you very much :)
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook