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One moles of anhydrous AB dissolves in w...

One moles of anhydrous `AB` dissolves in water and liberates `21.0 J mol^(-1)` of heat. The valueof `DeltaH^(Theta)` (hydration) of `AB` is `-29.4 J mol^(-1)`. The heat of dissolution of hydrated salt `AB.2H_(2)O(s)` is

A

`50.4 J mol^(-1)`

B

`8.4 J mol^(-1)`

C

`-50.4 J mol^(-1)`

D

`-8.4 J mol^(-1)`

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The correct Answer is:
B
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ALLEN-THERMODYNAMICS -EXERCISE -3
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  2. The enthalpy change of a reaction does not depend on

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  3. Form the thermochemical reactions. C(graphite) +1//2 O(2)(g) to CO(g...

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  4. If H(2)+1//2O(2)rarr H(2)O , Delta =-68.39 Kcal K+H(2)O+ "water" rar...

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  5. Given C(s)+O(2)(g)rarr CO(2)(g)+94.2 Kcal H(2)(g)+2O(2)(g)rarr CO(2)...

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  6. From the following data, the heat of formation of Ca(OH)(2)(s) at 18^(...

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  7. If H(2)(g) + Cl(2)(g) rarr 2HCl, Delta H^(@) = -44 kcal" "…..(i) ...

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  8. In the reaction : S+3//2O(2) rarr SO(3)+"2x kcal" and SO(2) +1//2O(2) ...

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  9. If S+O(2)toSO(2),DeltaH=-298.2 " kJ" " mole"^(-1) SO(2)+(1)/(2)O(2)t...

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  10. Givecn that : Zn+1//2O(2)rarr ZnO+84000 cal ……………1 Hg+1//2O(2)rarr...

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  11. Given that - 2C(s)+2O(2)(g)rarr 2CO(2)(g) Delta H = -787 KJ H(2)(g...

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  12. Find the heat change in the reaction: NH3(g)+HCI(g) to NH4CI(s) fr...

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  13. The heat of reaction of A+(1)/(2)O(2)rarr AO is -50 K call and AO+...

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  14. C(s)+O(2)(g)rarr CO(2)(g)+94.0 K cal. CO(g)+(1)/(2)O(2)(g)rarr CO(2)...

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  15. Using the following thermochemical data. C(S)+O(2)(g)rarr CO(2)(g), ...

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  16. The enthalpy of vaporization of liquid water using the data : (i) H...

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  17. H(2)(g)+1//2O(2)(g)=H(2)O(l) , Delta H(298 K)=-68.32 Kcal. Heat of vap...

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  18. The heat of solution of anhydrous CuSO4 and CuSO4. 5H(2)O are -15.89 a...

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  19. One moles of anhydrous AB dissolves in water and liberates 21.0 J mol^...

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  20. Which of the following expression is true?

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