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If DeltaH is the enthalpy change and Del...

If `DeltaH` is the enthalpy change and `DeltaU` the change in internal energy accompanying a gaseous reaction, then

A

`DeltaH` is always greater than `DeltaU`.

B

`DeltaH` is always less than `DeltaU`.

C

`DeltaH lt DeltaU` only if the number of mole of the products is less than that of the reactants.

D

`DeltaU lt DeltaH` only if the number of mole of the reactants is less than that of the products.

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CENGAGE CHEMISTRY-THERMODYNAMICS-Exercises (Multiple Correct)
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  2. In which of the following entropy increases?

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  4. Which of the options give below are correct?

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  5. Which of the following are thermodynamically stable?

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  6. Which of the following affect the heat of reaction?

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  7. Which of the following type of energies are involved in Born Haber's c...

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  8. Which of the following are true about resonance enegry?

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  9. Hess' law is applicable for determination of enthalpy of

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  10. Indicate in which case/cases the spontaneity of a change is favoured w...

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  11. Endothermic reactions, having DeltaS = +ve masy be spontaneous if

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  12. If DeltaH is the enthalpy change and DeltaU the change in internal ene...

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  13. An isolated system is that system in which

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  14. In a reaction, DeltaH and DeltaS both are more than zero. In which of ...

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  15. State the first law of thermodynamics.

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  16. In which reaction(s), DeltaS in negative?

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  17. The heat evolved in the combustion of benzene is given by C(6)H(6) (...

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  18. The heat of neutralization fo a stron acid by a strong base is a const...

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  19. The enthalpy change for the process C("graphite") rarr C(g)is called

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  20. Enthalpy change equal internal energy change when

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