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From the thermochemical reactions, C(gra...

From the thermochemical reactions, C(graphite)`+1//2O_(2)rarr CO , Delta H = -110.5` KJ
`CO+1//2O_(2)rarr CO_(2),Delta H=-283.2` KJ the heat of reaction of C(graphite) `+O_(2)rarr CO_(2)` is :

A

393.7 KJ

B

`-393.7` KJ

C

`-172.7` KJ

D

`+172.7` KJ

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The correct Answer is:
B
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ALLEN-THERMODYNAMICS -EXERCISE -3
  1. Given that , A(s) rarr A(l)DeltaH=x A(l) rarr A(g), DeltaH=y The...

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  2. The enthalpy change of a reaction does not depend on

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  3. From the thermochemical reactions, C(graphite)+1//2O(2)rarr CO , Delta...

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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(g) , Delta H^(@)=-44 Kcal 2Na(s)+2HCl...

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  8. Given : S((s))+(3)/(2)O(2(g))rarrSO(3(g)+2X Kcal SO(2(s))+(1)/(2)O(2...

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  9. If S +O(2) rarr SO(2), DeltaH =- 298.2 kJ SO(2)+1//2O(2) rarr SO(3),...

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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 : NH(3)(g)+HCl(g)rarr NH(4)Cl(s) ...

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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 vapourisation of liquid water using the data : H(2)(...

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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 CuSO(4) and CuSO(4).5H(2)O are -15.8...

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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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