Entropy Flashcards
- Define entropy. - Explain the relationship between entropy and the number of microstates. - Predict the sign of the entropy change for chemical and physical processes.
1
Q
Reversible Process
A
- Measurement of disorder, randomness, or the dispersal of energy within a system.
- Systems naturally evolve towards states of higher energy, meaning they tend to become more disorganized over time.
2
Q
Entropy (S)
A
A process that can be reversed without any net change to the system or surroundings, occurring infinitely slowly to maintain equilibrium.
3
Q
What are the differences between entropy and reversible process?
A
- Entropy measures how spread out the energy is, while reversible process requires perfect equilibrium throughout.
- Reversible process has no increase in total entropy, but most real processes increase entropy.
4
Q
What are the similarities between entropy and reversible process?
A
- Both concepts are connected through the second law of thermodynamics, which states that ENTROPY tends to INCREASE in real (irreversible) processes.
- Entropy change (ΔS) helps determine whether a process is reversible or not.
5
Q
What are the applications to reversible process and entropy?
A
- Reversible processes are idealized models used to understand thermodynamic limits (Carnot engines).
- In real life, all processes increase entropy, making them irreversible.
