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Thread: heat resistance question

  1. #1 heat resistance question 
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    if something is extremely heat resistant and then once it is heated would it take the same amount of time to lose the heat it has gained.
    (the heating is in the same conditions as losing the heat gained)


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  3. #2  
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    If we take a closed system, where no work is being done on or by the system the first law of thermodynamics simplifys

    du = Q/t

    du = Cv(T2-T1)

    note only if this is a small temperature change as Cv is a constant, in reality it is a function of temperature.

    so we get that
    Q/t = Cv(T2 - T1)

    now if we want to go from T2 to T1, or from T1 to T2. the value of Q/t is the same but with a different sign. and therefore the rate of flow of heat will be the same. in each case



    [/tex]


    everything is mathematical.
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  4. #3  
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    thanks
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