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Answer in brief. What is entropy? Give its units. - Chemistry

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Question

Answer in brief.

What is entropy? Give its units.

Short/Brief Note
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Solution

  1. Entropy is a measure of molecular disorder or randomness.
  2. An entropy change of a system is equal to the amount of heat transferred (Qrev) to it in a reversible manner divided by the temperature (T) in Kelvin at which the transfer takes place. Thus,
    `triangle "S" = ("Q"_"rev")/"T"`
  3. Units of entropy: J K–1

Note: Entropy or its change ∆S is a state function and depends on the initial and final states of the system and not on the path connecting two states

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Chapter 4: Chemical Thermodynamics - Exercises [Page 87]

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Balbharati Chemistry [English] Standard 12 Maharashtra State Board
Chapter 4 Chemical Thermodynamics
Exercises | Q 3.2 | Page 87

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