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In which reaction Delta S is positive :-...

In which reaction `Delta S` is positive :-

A

`H_(2)O(l)rarr H_(2)O(s)`

B

`3O_(2)(g)rarr 2O_(3)(g)`

C

`H_(2)O(l)rarr H_(2)O(g)`

D

`N_(2)(g)+3H_(2)(g)rarr 2NH_(3)(g)`

Text Solution

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The correct Answer is:
C
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ALLEN-THERMODYNAMICS -EXERCISE -2
  1. Delta S for the reaction , MgCO(3)(s)rarr MgO(s)+CO(2)(g) will be :

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  2. Change in entropy is negative for

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  3. In which reaction Delta S is positive :-

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  4. When the egg is hard boiled, there is

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  5. If S^(@) for H(2),Cl(2) and HCl are 0.13, 0.22 and 0.19 KJ K^(-1)mol^(...

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  6. Which has the least entropy :

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  7. When two gases are mixed the entropy :-

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  8. If the enthalpy of vaporisation of water is 186.5 J mol^(-1), then ent...

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  9. Calculate the enthalpy of vaporisation per mole for ethanol. Given Del...

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  10. If 900J//g of heat is exchanged at boiling point of water then water...

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  11. Calculate the enthalpy of vaporisation per mole for ethanol. Given Del...

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  12. 5 mol of an ideal gas expand reversibly from a volume of 8 dm^(3) to 8...

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  13. In a spontaneous irreversible process the total entropy of the system ...

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

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  15. Calculate the entropy of Br(2)(g) in the reaction H(2)(g)+Br(2)(g)rarr...

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  16. Ammonium chloride when dissolved in water leads to a cooling sensation...

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  17. In which of the following cases entropy decreases?

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  18. Which of the following state function is not zero at standard state :-

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  19. Entropy change for an adiabatic reversible process is

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

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