Answer: Is My Logic Correct: Reversible Processes & Heat Transfer?

In summary, reversible processes are those that can be reversed without any changes in the system or its surroundings. Heat transfer in reversible processes occurs at the same temperature as the surroundings, making it easier to return the system to its original state. Entropy remains constant in reversible processes, as all changes are reversible and do not increase disorder. Not all processes can be reversible, as they must be carried out in infinitesimal steps and in thermal equilibrium with the surroundings. Reversible processes differ from irreversible processes in that they involve small, reversible changes while irreversible processes involve larger, spontaneous changes that cannot be undone.
  • #1
Rohit93
1
0
If for two reversible processes we have the same internal energy change, if work done is maximum for one, is heat transfer minimum and vice versa?
The logic that I use is that since dU=dQ+dW, for constant dU if dW is more for one, heat transfer dQ is less and vice versa just to keep the sum constant.
Is my logic correct or wrong?
 
Science news on Phys.org
  • #2
Your logic is essentially correct. Using the First Law for a process between state 1 and state 2,
U2-U1 = Q-W,

which leads to the same conclusion.​
 
  • Like
Likes Rohit93

Related to Answer: Is My Logic Correct: Reversible Processes & Heat Transfer?

1. What is a reversible process?

A reversible process is one in which the system and its surroundings can be returned to their original states without leaving any trace of the process. This means that all changes in the system are reversible and there is no net change in the entropy of the universe.

2. How is heat transfer related to reversible processes?

Heat transfer is the exchange of thermal energy between two bodies at different temperatures. In reversible processes, heat transfer occurs at the same temperature as the surroundings, making it easier to return the system to its original state.

3. What is the role of entropy in reversible processes?

Entropy is a measure of the disorder or randomness in a system. In reversible processes, the entropy of the system remains constant, as all changes are reversible and do not increase the disorder of the system.

4. Can all processes be reversible?

No, not all processes can be reversible. In order for a process to be reversible, it must be carried out in infinitesimal steps and the system must be in thermal equilibrium with its surroundings at all times. This is not always possible in real-world situations.

5. How do reversible processes differ from irreversible processes?

Reversible processes are characterized by small changes that can be reversed, while irreversible processes involve larger, spontaneous changes that cannot be reversed. In reversible processes, the system and its surroundings can be returned to their original states, while in irreversible processes, this is not possible.

Similar threads

I Confusion on Callen's Maximum Work Theorem
    • Thermodynamics
Replies
7
Views
1K
I Graphical difference between adiabatic and isothermal processes.
    • Thermodynamics
Replies
1
Views
684
I Understand the Thermodynamic Identity: Is This Correct?
    • Thermodynamics
Replies
3
Views
1K
I Why does Callen insist a process must be reversible here?
    • Thermodynamics
Replies
8
Views
1K
Why does the entropy of a closed system remain constant in a reversible process?
    • Thermodynamics
Replies
10
Views
2K
I Entropy change due to heat transfer between sources
    • Thermodynamics
Replies
15
Views
1K
I Questions about my Understanding of Thermodynamics and Statistical Mechanics
    • Thermodynamics
Replies
2
Views
521
What is ##Tds## in this equation : ##dU = Tds - PdV##
    • Introductory Physics Homework Help
Replies
14
Views
742
B Question regarding using the expression $dE_{int}$=nC_vdT$
    • Thermodynamics
Replies
3
Views
827
B Change in entropy of reversible isothermal process
    • Thermodynamics
Replies
11
Views
370

Hot Threads

Recent Insights

Back
Top