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200 g water is heated from 40 o C to 60 o C . Ignoring the slight expansion of water, the change in its internal energy is close to (Given specific heat of water = 4184 J kg - 1 K - 1 ):

Options

  1. A167.4 k J
  2. B8.4 k J
  3. C4.2 k J
  4. D16.7   k J

Correct answer

D. 16.7   k J

Step-by-step solution

Assuming isochoric process Q = ∆ U ∆ U = 0.2 × 4184 × 20 = 16.7   k J

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