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According to third law of thermodynamics...

According to third law of thermodynamics, the entropy at `0 K` is zero for

A

elements in their stable form

B

perfectly crystalline solids

C

substances at `1 "atm"` and `25^(@)C`

D

`N_(2)O`

Text Solution

Verified by Experts

The correct Answer is:
B
For perfectly crystalline solids at `0 K`, all molecular motion ceases and particles are closely packed. Thus randomness and hence entropy is minimum.
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DINESH PUBLICATION-CHEMICAL THERMODYNAMICS AND CHEMICAL ENERGETICS -Exercise
  1. For which of the following cases is DeltaS=DeltaH//T

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  2. In a reversible process, Delta S(sys) + Delta S(surr) is

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  3. According to third law of thermodynamics, the entropy at 0 K is zero f...

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  4. Which of the following has highest entropy?

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  5. The total entropy change for a system and its surroundings increases, ...

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  6. Which of the following provide exceptions to third law of thermodynami...

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  7. Which thermodynamics property provides a measure of randomness in the ...

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  8. Which one of the following is correct ?

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  9. An endothermic gaseous reaction, (1)/(2)X+Y to2Z proceeds spontane...

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  10. The sign of DeltaG for the process of melting of ice at 273K and 1 atm...

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  11. For a hypothetical reaction A+B to C if DeltaG^(@) gt 0

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  12. The free energy change for a reversible reaction at equilibrium is

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  13. At 27^(@)C for reaction, C(6)H(6)(l)+(15)/(2)O(2)(g)to6CO(2)(g)+3H(2...

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  14. A particular reaction at 27^(@)C for which DeltaH gt 0 and DeltaS gt 0...

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  15. Which of the following expression defines the physical significance of...

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  16. A gas is allowed to expand reversibly under adiabatic conditions. What...

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  17. The hypothetical gaseous reaction A+B to AB

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  18. For a process H(2)O(s) rarr H(2)O(l) at 273 K

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  19. For the process "Dry ice" to CO(2)(g)

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  20. The non- expansion work of a system

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