Ask Question
15 October, 14:57

Indicate whether the following statements are true or false for a reversible isothermal process: (A) Q=T (∆S). (B) ∆U=0. (C) The entropy change of the system is always zero. (D) The total entropy change of the system and the surroundings is zero. (E) Q=W. (F) The entropy change of the environment is negative. (G) The total entropy change of the system and the surroundings is negative.

+1
Answers (1)
  1. 15 October, 15:53
    0
    A) True

    B) True

    C) False

    D) True

    E) True

    F) False

    G) False

    Explanation:

    Reversible - isothermal process:

    We know that a process called reversible if when this process will be revers then it will not leave any effect on surrounding will return in original state.

    A process is called isothermal process if, initial and final temperature is same.

    A)

    Q=TΔS

    Yes it is true for reversible and isothermal process.

    B)

    ΔU = 0

    For isothermal process ΔU = 0.

    It is true only for ideal gas.

    C) The entropy change of system can be positive, negative.

    So it is false.

    D)

    We know that

    Entropy change of universe = Entropy change of system + Entropy change of surrounding.

    For reversible process

    Entropy change of universe = 0

    So it is true.

    E)

    From first law

    Q = ΔU + W

    For isothermal process ΔU = 0. (only for ideal gas)

    ⇒Q = W

    So it is true.

    F)

    The entropy change of surrounding can be positive, negative.

    So it is false.

    G) We know that total entropy change of universe given as

    Entropy change of universe = Entropy change of system + Entropy change of surrounding.

    For reversible process

    Total Entropy change of universe = 0

    So it is false.
Know the Answer?
Not Sure About the Answer?
Find an answer to your question ✅ “Indicate whether the following statements are true or false for a reversible isothermal process: (A) Q=T (∆S). (B) ∆U=0. (C) The entropy ...” in 📘 Engineering if you're in doubt about the correctness of the answers or there's no answer, then try to use the smart search and find answers to the similar questions.
Search for Other Answers