Mechanical Engineering - Thermodynamics - Discussion

Discussion Forum : Thermodynamics - Section 3 (Q.No. 2)
2.
In an irreversible process, there is a
loss of heat
no loss of heat
gain of heat
no gain of heat
Answer: Option
Explanation:
No answer description is available. Let's discuss.
Discussion:
10 comments Page 1 of 1.

Gani said:   8 years ago
For example, if you take a pipe which carrying steam, Steam will lose some heat to the atmosphere during transfer, but it cannot get heat from the atmosphere.

This is some practical example of the Irreversible process.

Sanjeev said:   6 years ago
No, the answer is correct for this question.

Because whenever a system goes through an irreversible process, it loses its ability to do work. So, for an irreversible process, there is always a loss of availability.

Vinoth said:   7 years ago
String of liquid in an adiabatic container is an irreversible process because due to viscosity there is heat generation.

But this heat is a gain not went out due to the adiabatic wall.

So answer is wrong.

Mahesh said:   7 years ago
Four of the most common causes of irreversibility are friction, unrestrained expansion of a fluid, heat transfer through a finite temperature difference, and mixing of two different substances.

Arvind pandey said:   1 decade ago
Irreversible process. An irreversible process is one in which heat is transferred through a finite temperature. Examples:-

Relative motion with friction.

Subhash mandal said:   7 years ago
Friends help me, give the solution of the question of " a perfect gas at 27 C is heated till its volume is double. What is the final temperature ?

Ashu said:   6 years ago
@Subhash

The answer will be 600k or 327*deg;c.
use PV/T=const.

Ashu said:   6 years ago
@Subhash

The answer will be 600k or 327*deg;c.
use PV/T=const.

Harish said:   10 years ago
Why there is always loss of heat, why not gain of heat?

Love said:   1 decade ago
Since in actual process we have to overcome friction.

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