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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

`Delta H` is always greater than `Delta U`

B

`Delta H lt Delta U` only if the number of moles of the products is greater than the number of the reactants

C

`Delta H` is always less than `Delta U`

D

`Delta H lt Delta U` only if the number of moles of the product is less than the number of moles reactants

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The correct Answer is:
D
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RESONANCE-THERMODYNAMICS-Exercise -1 Part -II Only option correct type
  1. Determine which of the following reactions at constant pressure repres...

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  2. Consider the reaction at 300 K H(2)(g)+Cl(2)(g)rarr2HCl(g), " "Del...

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

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  4. Which plot represent an exothermic reaction ?

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  5. For which of the following change Delta H!=Delta U?

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  6. Calculate the standard internal energy of formation of liquid methyl a...

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  7. 2C+O(2)rarr2CO, Delta H= - 220 kJ which of the following statements is...

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  8. {:(C(s)+O(2)(g)rarrCO(2)(g), ,,,,DeltaH= -94.3 kcal//mol),(CO(g)+(1)/(...

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  9. In the reaction , CO(2)(g)+H(2)(g)rarrCO(g)+H(2)O(g), " "DeltaH= 2.8...

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  10. Given, H(2)(g)+Br(2)(g)rarr2HBr(g),DeltaH(1)^(0) and standard enthalpy...

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  11. For the following reaction, {:(C("diamond")+O(2)to CO(2)(g),, DeltaH...

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  12. The standard heat of combustion of a solid boron is equal to:

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  13. The heat of combustion of sucrose (C(12)H(22)O(11)) is 1350 kcal//mol....

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  14. If S+O(2)toSO(2),DeltaH=-298.2 " kJ" " mole"^(-1) SO(2)+(1)/(2)O(2)t...

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  15. When a certain amount of ethylene was combusted, 5644 kJ heat was evol...

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  16. The values of heat of combustion of ethane (C(2)H(6)) and ethyne (C(2)...

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  17. In the reaction CS(2)(l)+3O(2)(g)rarrCO(2)(g)+2SO(2)(g)DeltaH= -265 kc...

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  18. If enthalpy of dissociation of CH(4) and C(2)H(6) are 320 and 360 calo...

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  19. Heat of hydronization of ethene is x(1) and that of benzene is x(2). H...

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  20. Calculate the resonance energy of gaseous benzene from the given data ...

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