Mechanical Engineering - Thermodynamics - Discussion
Discussion Forum : Thermodynamics - Section 1 (Q.No. 18)
18.
The entropy __________ in an irreversible cyclic process.
Discussion:
36 comments Page 2 of 4.
MOHAN said:
9 years ago
As per the Clausius Theorem and Inequality:
The net changes in entropy in one complete cycle attributes a zero entropy change to the most efficient engine cycle.
The net changes in entropy in one complete cycle attributes a zero entropy change to the most efficient engine cycle.
Akash said:
1 decade ago
Entropy is a property. It does not depend on path. When final and initial points are same then entropy will be zero, be it reversible or irreversible.
Rakesh vekariya said:
10 years ago
For reversible cycle change in entropy is = 0.
For irreversible process change in entropy > 0.
If entropy < 0 then the process is impossible.
For irreversible process change in entropy > 0.
If entropy < 0 then the process is impossible.
Ram said:
5 years ago
Entropy will increase, see how in this case;
S2>>>S1.
dS=S1-S2 = negative value Or less than 0.
So, it is a case of irreversible process.
S2>>>S1.
dS=S1-S2 = negative value Or less than 0.
So, it is a case of irreversible process.
ANUPAM ADARSH MISHRA said:
1 decade ago
Entropy is a property and for any cyclic process change in property becomes Zero doesn't matter if it's being carried reversibly or irreversibly.
Bipin said:
1 decade ago
The meaning of decreasing entropy is not means that it becomes less than zero. It may be remains greater than zero and also greater than 0.
Haridas Bhuse said:
1 decade ago
Entropy is nothing but disorder in process e.g. Suppose we suppy 1j energy to system then it gives less work i.e. less then 1j.
Ashif said:
6 years ago
All the 3 options are correct because in irreversible heat rejection process entropy may increase decrease or remain constant.
SUNEEL SINGH CHAUHAN said:
10 years ago
We know that entropy increase due to heat. So irreversible process lot of heat generate due to friction so its increase.
BKrish said:
1 decade ago
Entropy will increases addition of heat and decreases with removal of heat?
Is this statement is right? if yes, why?
Is this statement is right? if yes, why?
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