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Question

How much energy would be needed to heat 450 grams of copper metal from a temperature of 35.0ºC to a temperature of 85.0ºC? The specific heat of metal at 35.0ºC is 0.385 J/g ºC.


  1. 8550

  2. 8700

  3. 8750

  4. 8500


Solution

The correct option is B

8700


Given mass, two temperatures and specific heat, the specific heat equation is given as

q = mCpΔT

q = (450 g) (0.385 J/g ºC) (50.0 ºC)

    = 8700 J

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