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A thermally insulated rigid container contains an ideal gas heated by a filament of resistance 100 through a current of 1 A for 5 min , then change in internal energy is

Options

  1. A0 kJ
  2. B10 kJ
  3. C20 kJ
  4. D30 kJ

Correct answer

D. 30 kJ

Step-by-step solution

Volume of the ideal gas is constant, so W=0 . Using first law of thermodynamics, aligned Q & = U U=i^2 R t & =1^2 100 5 60 & =30 10^3=30 ~kJ aligned

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