Question

For a closed system, the change in entropy for a reversible process is _________ the change in entropy for an irreversible process between the same two states
a. greater than
b. less than
c. the same as

Answer 1

Answer:

c. the same as

Explanation:

for a closed system:

⇒ ΔS > 0.....irreversible process

⇒ ΔSrev = ∫ dQ/T

for an irreversible process, ΔS is not the same as in a reversible process, since more than one reversible process is needed for the two ΔS to be equal.

⇒ ΔSirrev = ΔSrev1 + ΔSrev2 + ....

but if the initial and final states are the same, ΔS for an irreversible process can be calculated as if it were a reversible process.

⇒ ΔSirrev = ΔSrev