Exam-style question
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A metal block of mass 2 kg is heated, absorbing 3000 J of energy. If its temperature rises by 15 °C, what is the specific heat capacity of the metal?.
- A.100 J/kg°C
- B.200 J/kg°C
- C.300 J/kg°C
- D.400 J/kg°C
Model answer
What a good answer should say
- 100 J/kg°C
Explanation
Why this works
We apply the formula E = m x c x Δθ. Rearranging gives c = E / (m x Δθ).
Substituting E = 3000 J, m = 2 kg, and Δθ = 15 °C: c = 3000 / (2 x 15) = 100 J/kg°C. Thus, the specific heat capacity is 100 J/kg°C.
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