# Mechanical Engineering - Thermodynamics - Discussion

Discussion Forum : Thermodynamics - Section 1 (Q.No. 5)
5.
There is a loss of heat in an irreversible process.
True
False
Explanation:
No answer description is available. Let's discuss.
Discussion:
40 comments Page 4 of 4.

In an irreversible process, finite changes are made; therefore the system is not at equilibrium throughout the process.

I = Tods-dq.

Irreversible process does not go to completion, so that there is a loss in this process.

All above are wrong. Actually in irreversible process available energy decreased which makes the system to lose energy in form of heat.

.AJAY AND RAKESH said:   1 decade ago
C = dQ/dT.

The amount of heat required to raise the temperature of substance through one degree celsius is called specific heat. If the process occurs at constant volume is called specific heat at constant volume.

Thirupathi Malavath said:   1 decade ago
Irreversibility can be defined mathematically as a product of Surrounding Temperature(T) and change in entropy of the universe(ds) , which means loss of energy in the form of heat.

Irreversibility is occurs due to Heat transfer through a finite temperature difference in a process.

Amount of heat loss is proportional to irriversability.

Mayank agrawal said:   1 decade ago
Cyclic process are also irreversible in nature and in cyclic process there is no loss of heat energy due to the first law.