Question -
Which of the following processes is an iso-entropic process?
Options:
A .  Isothermal process
B .  Adiabatic process
C .  Isobaric process
D .  Isochoric process
Answer: Option B : B What do you mean by iso-entropic process? ⇒The name itself is giving you the answer. The entropy should be same before and after the process occurs. Here we know that, ΔS=dqT In case of adiabatic process, dq = 0 Therefore ΔS = 0
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