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NEETChemistryThermodynamics (C)

When pressure (P) changes during a process, what condition ensures that the process is reversible?

Options

  1. Ap is always greater than the pressure of the gas
  2. Bp is always less than the pressure of the gas
  3. Cp is infinitesimally greater than the pressure of the gas
  4. Dp remains constant throughout the process

Correct answer

C. p is infinitesimally greater than the pressure of the gas

Step-by-step solution

In a reversible process, the external pressure (P ex ) is always infinitesimally greater than the pressure of the gas (P in ) during compression, and infinitesimally less during expansion.

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