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DeltaH for the reaction, C("graphite")...

`DeltaH` for the reaction,
`C("graphite")+2H_(2)(g) to CH_(4)(g)`
at 298 K and 1 atm is -17900 cal. The `DeltaE` for the above conversion should be

A

`-17900` cal

B

`17900` cal

C

`17304` cal

D

`-17304` cal

Text Solution

Verified by Experts

The correct Answer is:
D
`C("graphite")+2H_(2)(g)toCH_(4)(g),DeltaH=-17900` cal
We have, `DeltaH=DeltaE+Deltan_(g)RT`
`therefore DeltaH=DeltaE-1xxRxxT`
`-17900=DeltaE-1xx298xx2`
`DeltaE=-17900+596=-17304cal`
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MHTCET PREVIOUS YEAR PAPERS AND PRACTICE PAPERS-CHEMICAL THERMODYNAMICS AND ENERGETIC-Exercise 2
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  2. A hypothetical reaction Ato2B, proceeds through following sequence of ...

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  3. DeltaH for the reaction, C("graphite")+2H(2)(g) to CH(4)(g) at 298...

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  4. The decreasing order of bond dissociation energies of C-C,C-H and H-H ...

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  5. If the end energies of H-H, Br-Br and H-Br are 433, 1992 and 364 kJ mo...

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  6. At 27^(@)C one mole of an ideal gas is compressed isothermally and rev...

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  7. The internal energy change when a system goes from state A to B is 40 ...

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  8. Given, 2Fe+(3)/(2)O(2)toFe(2)O(3),DeltaH=-193.4kJ,Mg+(1)/(2)O(2)to MgO...

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  9. Enthalpy of formation off HF and HCl are -161 kJ and -92 kJ, respectiv...

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  10. For the reaction, 2H(2)+O(2) to 2H(2)O,DeltaH=571. bond energy of H-H=...

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  11. The bond energy of ann O-H bond is 109 kcal/mol. When 1 mole of water ...

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  12. Given the following thermochemical equations, Zn+(1)/(2)O(2) to ZnO+...

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  13. The enthalpy of vaporisation of liquid water using the data H(2)(g)+...

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  14. Energy requried to dissociate 4 g of gaseous hydrogen into free gaseou...

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  15. The enthalpy of a monoatomic gas at T kelvin is

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  16. The enthalpy change (DeltaH) for the process, N(2)H(4)(g)to 2N(g)+4H(g...

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  17. CH(2)=CH(2)(g)+H(2)(g) to CH(3) to CH(3)(g) The heat of reaction is ...

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  18. The following is (are) endothermic reaction I. combustion of methane...

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  19. In a calorimeter, the temperature of the calorimeter increases by 6.12...

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  20. Consider the following reaction and corresponding energy diagram: AtoP...

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