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Given C(s)+O(2)(g)toCO(2)(g), DeltaH=-...

Given
`C(s)+O_(2)(g)toCO_(2)(g)`, `DeltaH=-395 kJ`
`S(s)+O_(2)(g)toSO_(2)(g)`, `DeltaH=-295 kJ`
`CS_(2)(l)+3O_(2)(g)toCO_(2)(g)+2SO_(2)(g)`, `DeltaH=-1110 kJ`
The heat of formation of `CS_(2)(l)` is

A

`125 kJ mol^(-1)`

B

`31.25 kJ mol^(-1)`

C

`62.5 kJ mol^(-1)`

D

`250kJ mol^(-1)`

Text Solution

Verified by Experts

The correct Answer is:
A
Multiply `(ii)` with `2`, add `(i)` and `(ii)` and subtract `(iii)`
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DINESH PUBLICATION-CHEMICAL THERMODYNAMICS AND CHEMICAL ENERGETICS -Exercise
  1. For a system in equilibrium, DeltaG=0, under conditions of constant

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  2. In the reversible reaction of the type A+B hArr AB, in general.

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  3. Given C(s)+O(2)(g)toCO(2)(g), DeltaH=-395 kJ S(s)+O(2)(g)toSO(2)(g...

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  4. In an electrochemical cell, if E^(@) is the e.m.f. of the cell involvi...

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

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  6. The DeltaH value for reaction C+(1)/(2)O(2)toCO and CO+(1)/(2)O(2)to...

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  7. Given : C("diamond")+O(2)rarrCO(2),DeltaH=-395 kJ C("graphite"...

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  8. The law of Lavoisier and Laplace illustrates

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  9. For the reaction H(2)+I(2)hArr2NHI, DeltaH=12.40 kcal. The heat of f...

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  10. According to the reaction C(6)H(6)+15//2O(2)to3H(2)O+6CO(2) (Delta...

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  11. Thermodynamic equilibrium involves

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  12. In general, for exothermic reactions to be spontaneous

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  13. The heat of neutrasation of a strong acid and a strong alkali is 57.0K...

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  14. Which of the following is true for a reaction H(2)O(l)toH(2)O(g) at 10...

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  15. The free energy change DeltaG = 0, when

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  16. {:(Given :,C+2StoCS(2),DeltaH=117 kJ),(,C+O(2)toCO(2),DeltaH=-393 kJ),...

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  17. The enthalpies of combustion of carbon and carbon monoxide are -390 kJ...

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  18. The combustion reaction occuring in an automobile is 2C(8)H(18)+25O(2)...

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  19. Latent heat of vaporisation of a liquid at 500K and 1 atm pressure is ...

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  20. The table given below lists the bond dissociation energy (E("diss")) f...

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