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S (rhombic) + O(2)(g) rightarrow SO(2)(g...

`S (rhombic) + O_(2)(g) rightarrow SO_(2)(g), Delta H = -297.5 kJ`
`S(monoclinic) + O_(2) (g) rightarrow SO_(2)(g), Delta H = -300 kJ`
The above data can predict that

A

Rhombic sulphur is yellow in colour

B

Monoclinic sulphur has metallic lusture

C

Monoclinic sulphur is more stable

D

`Delta H` transition of `S_(R )` to `S_(M)` is endothermic

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Verified by Experts

The correct Answer is:
D
`S_(R )+O_(2)rarr SO_(2) , Delta H_(1)=-297.5 kJ`
`S_(M)+O_(2)rarr SO_(2), Delta H_(2) = -300 kJ`
`S_(R )rarr S_(M) , Delta H_(3) = ?`
eq(iii) = eq(i) - eq(ii)
`Delta H_(3)=-297.5-(-300)`
`Delta H_(3)=+2.5 kJ` so, it endothermic process.
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ALLEN-THERMODYNAMICS -EXERCISE -3
  1. Which plot represent an exothermic reaction ?

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  2. Which of the following value of DeltaH(f)^(@) represent that the produ...

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  3. S (rhombic) + O(2)(g) rightarrow SO(2)(g), Delta H = -297.5 kJ S(mon...

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  4. Heat of formation, Delta H(f)^(@) of an explosive compound like NCl(3)...

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  5. According to the following reaction C(S)+1//2O(2)(g)rarr CO(g), Delta ...

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  6. Which of the following represents an exothermic reaction :-

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  7. The heat change during the reaction 24g C and 128g S following he chan...

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  8. For the reaction ,3O(2)rarr 2O(3),DeltaH=+ve. We can say that :

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  9. From the reaction P(White) rarr P(Red) Delta H =-18.4KJ, it follows th...

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  10. In Kirchoff's equation which factor affects the heat of reaction :

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  11. For the reaction , H(2)(g)+1//2O(2)(g)=H(2)O(l), Delta C(p)=7.63 "cal/...

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  12. The enthalpy of a reaction at 273 K. is -3.57 KJ. What will be the ent...

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  13. For the reactions, (i) H(2)(g)+Cl(2)(g)rarr 2HCl(g)+ xKJ (ii) H(2)...

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  14. Since the enthalpy of elements in their natural state is taken to be z...

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  15. For the reaction H(2)+I(2)hArr2HI, DeltaH=12.40 kcal. The heat of fo...

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  16. AT 300K, the standard enthalpies of formation of C(6)H(5)COOH(s), CO(2...

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  17. Enthalpy of a compound is equal to its :- (When it is formed from cons...

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  18. Which of the following equations represent standard heat of formation ...

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  19. The enthalpy of formation of ammonia is -46.0 KJ mol^(-1) . The entha...

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  20. Given the enthalpy of formation of CO(2)(g) is -94.0 KJ, of CaO(s) i...

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