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Entropy is:
1. absolute temperature / heat change 
2. heat change / absolute pressure 
3. absolute pressure / heat change 
4. heat change / absolute temperature 

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Correct Answer - Option 4 : heat change / absolute temperature 

Concept:

  • Entropy is a measure of disturbance, higher the entropy with the positive sign, more are the chances of the reaction taking place spontaneously

\(S = \frac{{{\rm{Δ }}Q}}{T}\)

Where S is entropy, Δ Q is heat exchanged and T is absolute temperature.

  • The SI unit of Entropy is Joule per Kelvin (J/K).

EXPLANATION:

  • Heat exchange (Δ Q) is a type of energy.
  • Joule (J) is the SI unit of Work or Energy.
  • Kelvin is the SI unit of temperature

So SI unit of entropy (S) = Unit of energy/ Unit of temperature = J/K

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