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The combustion reaction occuring in an a...

The combustion reaction occuring in an automobile is `2C_(8)H_(18)+25O_(2)(g) to16CO_(2)(g)+18H_(2)O(g)` This reaction is accompanied with:

A

`+`, `-`, `+`

B

`-`, `+`, `-`

C

`-`, `+`, `+`

D

`+`, `+`, `-`

Text Solution

Verified by Experts

The correct Answer is:
B
`DeltaH=-ve` (combustion reaction),
`DeltaS=+ve(n_(P) gt n_(R ))` and `DeltaG=-ve` (because reaction is spontaneous).
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DINESH PUBLICATION-CHEMICAL THERMODYNAMICS AND CHEMICAL ENERGETICS -Exercise
  1. {:(Given :,C+2StoCS(2),DeltaH=117 kJ),(,C+O(2)toCO(2),DeltaH=-393 kJ),...

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

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

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

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

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  6. The enthalpy of formation for C(2)H(4)(g), CO(2)(g) and H(2)O(l) at 25...

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  7. For a reaction to occur spontaneously

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  8. For a process to be spontaneous

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  9. A particular reaction has a negative value for the free energy change...

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  10. The calorific value of fat is

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  11. The heat of formation of the compound in the following reaction is H...

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  12. When water is added to quick lime, the reaction is

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  13. Which relation is correct ?

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  14. Variation of heat of reaction with temperature is known as

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  15. Enthalpy of reaction DeltaH is expressed as

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  16. Heat capacity is

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  17. Given that C+O(2)rarrCO(2),DeltaH^(@)=-xKJ and 2CO+O(2)rarr2CO(2),Delt...

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

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

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  20. NH(3)(g)+3Cl(2)toNCl(3)(g)+3HCl(g),DeltaH(1) N(2)(g)+3H(2)(g)to2NH(3...

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