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Which of the following statements relati...

Which of the following statements relationship is not correct?

A

In exothermic reaction, the enthalpy of product is less than that of the reactants

B

`DeltaH_(fus)=DeltaH_(subl)-DeltaH_(vap)`

C

A reaction for which `DeltaH^(@) lt 0` and `DeltaS gt 0` is possible at all temperatures.

D

`DeltaH` is less than `DeltaE` for combustion of carbon to carbon dioxide.

Text Solution

Verified by Experts

The correct Answer is:
D
In the formation of `CO_(2)` from carbon,
`C(s) +O_(2)(g)toCO_(2)(g)`
`Deltan_(g)=1-1=0`
`:. DeltaH=DeltaE`
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DINESH PUBLICATION-CHEMICAL THERMODYNAMICS AND CHEMICAL ENERGETICS -Exercise
  1. According to Hess's law, the thermal effects of a reaction depends on

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  2. Hess's law states,

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  3. Which of the following statements relationship is not correct?

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  4. A hypothetical reaction, A rarr 2B, proceeds via following sequence of...

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  5. N(2)(g) +2O(2)(g) rarr 2NO(2)(g) +X kJ 2NO(g)+O(2)(g) rarr 2NO(2) +Y...

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  6. Enthalpy of formation of compound is

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  7. The value of DeltaH for the process given below, NH(4)OH(aq)toNH(4)^(+...

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  8. i. H(2)(g) +CI(2)(g)rarr 2HCI(g),DeltaH =- x kJ ii. NaCI +H(2)SO(4) ...

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  9. The reaction SO(2)(g) +1//2O(2)(g) rarr SO(3)(g) should be

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  10. The enthalpy combustion of a substance

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  11. Xg of ethanal was subjected to combustion in a bomb calorimeter and th...

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  12. The enthalpy change for the process C("(graphite)") rarr C((g)), Delta...

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  13. HA+OH^(-) to H(2)O+A^(-)+q(1) kJ H^(+)+OH^(-) to H(2)O+ q(2) kJ Th...

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  14. The heat change accompanying the reaction 2H(2)(g)+O(2)(g) to 2H(2)O...

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  15. When a solid melts there is

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  16. One gram-atom of graphite and one gram-atom of diamond were separately...

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  17. The reaction which shows heat of formation of water correctly is

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

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  19. The products of combustion of an aliphatic thiol (RSH) at 298 K are

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  20. For the transition C("(diamond)") rarr C("(graphite)"), DeltaH=-1.5 kJ...

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