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How much heat is given out when a piece of iron of mass 50g and...

Physics
WAEC 1990
How much heat is given out when a piece of iron of mass 50g and specific heat capacity 460 Jkg-1k-1 cools from 85oC to 25oC?
  • A. 1.38 x 106 J
  • B. 2.53x104J
  • C. 7.66x103J
  • D. 1.38x103J
  • E. 1.27 X103J
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Correct Answer: Option D
Explanation
Q = mcΔθ = 0.050 x 460 x (85 - 25) = 1.38x103J
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