Un casquillo de cobre de 8 kilogramos tiene que calentarse de 25 a 140 grados Celsius con el fin de expandirlo pata que se ajuste sobre un e

Question

Un casquillo de cobre de 8 kilogramos tiene que calentarse de 25 a 140 grados Celsius con el fin de expandirlo pata que se ajuste sobre un eje. ¿Cuanto calor se requirió?

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Verity 1 month 2021-08-08T16:58:57+00:00 1 Answers 1 views 0

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    2021-08-08T17:00:03+00:00

    Answer:

    354200J

    Explanation:

    Given parameters:

    Mass of copper bushing = 8kg

    Initial temperature  = 25°C

    Final temperature  = 140°C

    Unknown:

    Quantity of heat required to heat this mass = ?

    Solution:

    The amount of heat required to heat mass from one temperature to another is given by;

                      H = m c Δt

    where m is the mass

              c  is the specific heat

            Δt is the change in temperature

    C is a constant and for copper, its value is 385J/kg°C

     Input the parameters;

                H = 8 x 385 x (140 – 25) = 354200J

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