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The heats of combustion of C(2)H(4), C(2...

The heats of combustion of `C_(2)H_(4), C_(2)H_(6)` and `H_(2)` gases are -1409.5 KJ, -1558.3 KJ and -285.6 KJ respectively. The heat of hydrogenation of ethene is

A

`-136.8 KJ`

B

`-13.68 KJ`

C

273.6 KJ

D

1.368 KJ

Text Solution

Verified by Experts

The correct Answer is:
A
`C_(2)H_(4)+H_(2)rarr C_(2)H_(6) , Delta H_("hydrogeneration")=?`
`Delta H=Sigma (Delta H_("comb"))_(R )-Sigma (Delta H_("comb"))_(P)`
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ALLEN-THERMODYNAMICS -EXERCISE -3
  1. The change in the enthalpy of NaOH+HCl rarr NaCl+H(2)O is called :

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  2. Heat of neutralisation of oxalic acid is -106.7 KJ mol^(-1) using NaOH...

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  3. The heats of combustion of C(2)H(4), C(2)H(6) and H(2) gases are -1409...

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  4. The enthalpy of combustion of H(2) , cyclohexene (C(6)H(10)) and cyclo...

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  5. Bond energy of a molecule :

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  6. Among the following for which reaction heat of reaction represents bon...

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  7. The bond energies of F(2),Cl(2),Br(2) and I(2) are 155.4, 243.6, 193.2...

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  8. Energy required to dissociate 4g of gaseous hydrogen into free gaseous...

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  9. Heat evolved in the reaction H(2)+Cl(2) rarr 2HCl is 182 kJ Bond ene...

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  10. The enthalpy change for the reaction H(2)(g)+C(2)H(4)(g)rarr C(2)H(6)(...

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  11. Bond dissociation enthalpies of H(2)(g) and N(2)(g) are 436.0 kJ mol^(...

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  12. Consider the reactions : C((s))+2H(2(g)) rarr CH(4(g)), DeltaH=-X kc...

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  13. The enthalpy changes at 298 K in successive breaking of O-H bonds of ...

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  14. If values of Delta(f)H^(Theta) of ICI(g),CI(g), and I(g) are, respecti...

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  15. Heat of dissociation of benzene to elements is 5535 KJ mol^(-1). The b...

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  16. The enthalpy change for the reaction 2C("graphite")+3H(2)(g)rarrC(2)H(...

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  17. Cl(2)(g)rarr2Cl(g), In this process value of Delta H will be -

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  18. The magnitude of heat of solution ….. On addition of solvent to soluti...

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  19. If H(2)(g)=2H(g),DeltaH=104cal , then heat of atomisation of hydrogen ...

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  20. The heat of combustion of yellow phoshphorus and red phosphorus are -9...

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