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what is the usual definition of entropy ...

what is the usual definition of entropy ? What is the unit of entropy ?

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(i) Entropy is a measure of the molecular disorderliness (randomness) of a system `dS=dq_("rev")//T`
The entropy (S) is equal to heat energy exchanged (q) divided by the temperature (T) at which the exchange takes place. Therefore , The SI unit of entropy is `JK^(-1)`
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SURA PUBLICATION-THERMODYNAMICS -II.WRITE BRIEF ANSWER TO THE FOLLOWING QUESTIONS
  1. Define the following terms : isobaric process

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  2. Define the following terms : isochoric process

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  4. Predict the sign of DeltaG for the reaction at a very low temperature ...

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  6. Predict the feasibility of a reaction when (i) both DeltaH and Delt...

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  7. Define Gibb's free energy .

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  8. Define enthalpy of combustion.

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  9. The molar heat capacity of water is

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  10. Define the calorific value of food. What is the unit of calorific valu...

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  11. Enthalpy of neutralization of H(3)PO(3) "with " NaOH " is" -106.68 "kJ...

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  12. What is lattice energy?

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  13. Give two examples which are path dependent quantities. Are they proper...

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  14. State Kelvin- Planck statement of second law of thermodynamics.

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  15. The equilibrium constant of a reaction is 10, what will be the sign of...

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  16. Enthalpy of neutralization is always a constant when a strong acid is ...

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  17. a) State the third law of thermodynamics. B) Define entropy.

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  18. Write down the Born-Haber cycle for the formation of CaCl2

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  19. Identify the state and path functions out of the following a) Enthalpy...

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  20. State the various statements of second law of thermodynamics.

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