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24 January, 02:12

The specific heat of iron is 0.11 cal/goC. A cafeteria fork made of iron has a mass of 20 grams. How much heat energy is needed to raise the temperature of this form from 25oC to 75oC?

0.044 calories

0.275 calories

110 calories

9090.9 calories

+1
Answers (1)
  1. 24 January, 03:05
    0
    The formula q=mcΔT describes this problem.

    q is energy, m is mass, c is specific heat capacity and ΔT is change in temperature (final-initial)

    q = 20 g * 0.11 J/g °C * (75 °C-25 °C)

    q = 110 J
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