What is the value of 0! ?
Why entropy change for a reversible adiabatic process is zero ?
In the adiabatic process, reversible process have no heat transfer and entropy changes when heat transfer occurs. That's why entropy change is zero.
What is the Differential Equations and why we study this thing?
Differential Equation is a methodology to solving a root of the Differential Equations. This methodology use in problem solving strategies and it is very important to think different ways to solve a problem like differential equations.