Entropy is specifically a thermodynamic process that is associated with showing the lack of thermal energy that is used for converting into mechanical energy. In this case, there is a consistent randomness that is surrounded within the system as well as associated aspects.
The process in this case is both reversible and irreversible. So, when irreversible process is taken into consideration, entropy of universe will increase. Being the quantitative statement of 2nd law, this depends on extent of irreversible process that takes place.
It is very important that while irreversible process is taken, there should be no other associated aspects that has to be functioned.
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