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Chemical Engineering · Q458

Chemical Engineering Thermodynamics

Engineering and GATE · Chemical Engineering · question 458

Q458

As the time is passing, entropy of the universe

A.
Is increasing
Answer
B.
Is decreasing
C.
Remains constant
D.
Data insufficient, can't be predicted

Answer: Option A

Solution

Answer: Option A
Solution:
According to second law of thermodynamics, the entropy   for an irreversible or spontaneous process and   for an reversible process or almost equilibrium reached process. So for a natural process since there will be irreversibility always the system entropy goes on increasing until equilibrium is reached and once the system reaches the equilibrium the system entropy becomes equal to zero. Hence a maximum exists for a system.