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KVPY2011ChemistryStates of Matter

As isolated box, equally partitioned contains two ideal gases A and B as shown When the partition is removed, the gases mix. The changes in enthalpy ( H ) and entropy ( S ) in the process, respectively, are

Options

  1. Azero, positive
  2. Bzero, negative
  3. Cpositive, zero
  4. Dnegative, zero

Correct answer

A. zero, positive

Step-by-step solution

According to KTG Force of attraction and repulsion amongst molecules of ideal gas are negligible So, H =0 and randomness increases due to increase in volume so S =+ ve .

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