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For which change DeltaH cancel(=)DeltaU ...

For which change `DeltaH cancel(=)DeltaU` ?

A

`H_(2(g))+(I)_(2(g))hArr2HI_((g))`

B

`HCl_((aq.))+NaOH_((aq.))rarr NaCl_((aq.))+H_(2)O_((l))`

C

`C_((s))+O_(2(g))hArrCO_(2(g))`

D

`N_(2(g))+3H_(2(g)) rarr 2NH_(3(g))`

Text Solution

Verified by Experts

The correct Answer is:
D
`DeltaH=DeltaU+DeltanRT`
for `(a), (b), (c )` Deltan=0` and for `(d) Deltan=-2`
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P BAHADUR-THERMOCHEMISTRY-Exercise 4 objective Problems
  1. The heat requried to raise the temperature of body by 1^(@)C is called...

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  2. The enthalpy of reaction does not depend upon:

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  3. Calculate enthalpy change of the following reaction : H(2)C=CH(2(g))...

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  4. The enthalpies of combustion of carbon and carbond monoxide are -393.5...

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  5. Consider the reaction, N(2)+3H(2)hArr 2NH(3) carried out at constant...

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  6. If the bond dissociation energies of XY,X(2) and Y(2)( all diatomic mo...

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  7. The standard enthalpy of formation (Delta(f)H^(@)) at 298K for methan...

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  8. The enthalpy change for the following process are listed below: (a) ...

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  9. (Delta H - Delta U) for the formation of carbon monoxide (CO) from its...

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  10. Assuming that water vapour is an ideal gas, the internal energy change...

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  11. Identify the correct statement regarding a spontaneous process :

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  12. In a fuel cell methanol is used as fuel and oxygen gas is used as an o...

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  13. On the basis of the following thermochemical data : (Delta(f)G^(@)H((a...

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  14. For which change DeltaH cancel(=)DeltaU ?

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  15. Molar heat capacity of water in equilibrium with the ice at constant p...

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  16. Standard molar enthalpy of formation of CO(2) is equal to :

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  17. Delta(f)^(@) for CO(2(g)), CO((g)) and H(2)O((g)) are -393.5,-110.5 an...

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  18. Which of the reaction defines Delta(f)H^(@) ?

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  19. Using the data provided, calculate the multiple bond energy (kJ mol^(-...

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  20. The incorrect expression among the following is :

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