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NEET2002ChemistryThermodynamics (C)Actual

In a closed insulated container a liquid is stirred with a paddle to increase the temperature, which of the following is true?

Options

  1. AU =w 0, q=0
  2. BU =w=q 0
  3. CU =0, w=q 0
  4. Dw=0, U =q 0

Correct answer

A. U =w 0, q=0

Step-by-step solution

System is in a closed container. So there will be no heat transfer. Therefore the heat is q=0 . Now liquid is stirred with a paddle to increase the temperature which increases the internal energy E of the system. aligned & E =n C T & E 0 aligned Work is also done on the system when started with a paddle. gathered W 0 E =q+ W =0+ W , E = W E = W 0, q=0 gathered

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