Question

Entropy change for an adiabatic reversible process is

• A. zero
• B. +ve
• C. - ve
• D. negative or zero

Answer 1

The correct option is A zero

For a adiabatic reversible process
$q_{rev}=$ o (adiabatic process)
$\Delta S=\frac{q_{rev}}{T}$ (reversible process)
$\therefore \Delta S=O$