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Identify the correct statement regarding...

Identify the correct statement regarding entropy

A

At absolute zero temperature, the entropy of perfectly crystalline substances is `+ve`

B

At absolute zero temperature entropy of perfectly crystalline substance is taken to be zero

C

At `0^(@)C` the entropy of a perfectly crystalline substance is taken to be zero

D

At absolute zero temperature, the entropy of all crystalline substance is taken to be zero

Text Solution

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The correct Answer is:
B
According to 3rd law of thermodynamics at absolute zero temperature entropy of perfectly crystalline substance is taken to be zero.
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NARENDRA AWASTHI-THERMODYNAMICS-Exercise
  1. Chloroform has DeltaH("vaporization")=29.2 kJ//"mol" and boils at 61.2...

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  2. The entropy if vaporisation of benzene is 85JK^(-1) mol^(-1). When 117...

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  3. Identify the correct statement regarding entropy

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  4. Calculate DeltaS for following process : underset("at" 100K)(X(s)) ...

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  5. For a perfectly crystalline solid C(p.m.)=aT^(3), where ais constant. ...

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  6. Consider the following spontaneous reaction 3X(2)(g)rarr2X(3)(g). What...

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  7. For the reaction 2H(g)rarr H(2)(g), the sign of DeltaH and DeltaS resp...

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  8. Consider the following reaction. C(6)H(6)(l)+(15)/(2)O(2)(g)rarr6CO(...

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  9. Consider the following reaction at temperature T : CH(2)=CH(2)(g) +...

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  10. For a process to be spontaneous, DeltaG must be………… .

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  11. For a reaction to occur spontaneously

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  12. Which of the following conditions reagarding a chemical process ensure...

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  13. The free energy change DeltaG = 0, when

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  14. Which of the following conditions regarding a chemical process ensures...

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  15. Suppose that a reaction has DeltaH=-40kJ and DeltaS =- 50J//K. At what...

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  16. For isothermal expansion in case of an ideal gas :

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  17. What is the normal boiling point of mercury? Given : DeltaH (f)^(@)...

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  18. 19 gm of ice is converted into water at 0^(@)C and 1 atm. The entropie...

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  19. Using the listed [DeltaG(f)^(@) values] calculate DeltaG^(@) for the r...

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  20. From the following DeltaH^(@) and DeltaS^(@) values, predict which of ...

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