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NEET2026ChemistryThermodynamics (C)Actual

At a certain temperature, T (K), during a process, 500 J is absorbed by the system and work of 200 J is done by the system. Then, change in internal energy of the system is :

Options

  1. A400 J
  2. B300 J
  3. C700 J
  4. D500 J

Correct answer

B. 300 J

Step-by-step solution

According to the first law of thermodynamics: U = q + W Heat absorbed by the system, q = +500 J Work done by the system, W = -200 J Substituting the given values: U = 500 + (-200) = 300 J Answer: 300 J

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