A 0.5 kg body of specific heat capacity 900 J kg^-1 K^-1 is warmed by 40 K (no work done). The increase in its internal energy is:

  1. 9000 J
  2. 450 J
  3. 36,000 J
  4. 18,000 J
Answer

D) 18,000 J

Delta U = mcDeltatheta = 0.5 900 40 = 18,000 J. SLO P-11-C-12 · Understanding

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