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.
Anil said:
1 decade ago
Entropy of system depend on two factor 1st one is heat interaction. 2one is molecular disorder like friction due to intermolecular reaction.
In reversible system may increase or decrease.
In reversible system may increase or decrease.
Deep patel said:
1 decade ago
As per the clausius statement dQ/T <= 0 for irreversible cyclic process. i.e., entropy is always less than zero.
Shibunath said:
1 decade ago
They said increased or decreased they did not mention less than zero or more than zero.
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.
Vikram singh said:
1 decade ago
Entropy is less than 0 in irreversible process.
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.
Sangu said:
10 years ago
What do you mean by disorder?
BKvictor said:
10 years ago
Disorder means here the randomness. The flexibility of the molecules to respond to the property changes and move their way randomly.
As per kinetic theory of gases, there is no particular force of attraction or repulsion existing between them and hence they can go randomly and respond randomly. This is said to be disorder.
As per kinetic theory of gases, there is no particular force of attraction or repulsion existing between them and hence they can go randomly and respond randomly. This is said to be disorder.
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.
Mridul Banerjee said:
9 years ago
Entropy is a system property. So cyclic integral of entropy is zero. Thus entrpoy of the system does not change.
But the entropy of the universe should obviously increase as it is irreversible process.
But the entropy of the universe should obviously increase as it is irreversible process.
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