Question

Is the process isentropic if it has 100
1) True
2) False

Answer 1

An isentropic process is a reversible adiabatic process with no change in entropy, and if a process is 100% efficient, it is isentropic. In reversible processes, entropy remains constant, while in irreversible processes, entropy increases. The condensation of iodine gas to solid results in a negative change in entropy.

Step-by-step explanation:

An isentropic process is a reversible adiabatic process where no heat is transferred, and the system experiences no friction or other dissipative effects. In an isentropic process, the entropy remains constant because the process is reversible and does not increase the entropy of the universe according to the Kelvin statement of the second law of thermodynamics. Therefore, if a process has 100% efficiency, it is indeed isentropic as it indicates there is no increase in entropy.

In terms of changes in entropy:

1. Irreversible process: The entropy increases because the process cannot be reversed without changing other external conditions, leading to less order in the system.
2. Reversible process: The entropy remains the same as the system can be restored to its original state without altering its environment.

For the condensing of iodine gas into a solid, the change in entropy is negative, because the disorder of the system decreases as gas (which is highly disordered) becomes a solid (which is more ordered).