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The enthalpy of formation for C(2)H(4)(g...

The enthalpy of formation for `C_(2)H_(4)(g)`, `CO_(2)(g)` and `H_(2)O(l)` at `25^(@)C` and `1` atm. Pressure be `52`, `-394` and `-286 kJ mol^(-1)` respectively. The enthalpy of combustion of `C_(2)H_(4)(g)` will be

A

`+141.2kJ" "mol^(-1)`

B

`+1412kJ" "mol^(-1)`

C

`-141.2kJ" "mol^(-1)`

D

`-1412kJ" "mol^(-1)`

Text Solution

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The correct Answer is:
D
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The enthalpy of formation for C_(2)H_(4)(g),CO_(2)(g) and H_(2)O(l) at 25^(@)C and 1 atm. Pressure are 52, -394 and -286 KJ mol^(-1) respectively. The entahlpy of combustion of C_(2)H_(4) will be :-

If enthalpies of formation of C_(2)H_(4)(g)1 and H_(2)O(l) at 25(@)C and 1 atm pressure be 52,-394 and -286kJmol^(-1) respectively ,the enthalpy of combustion of C_(2)H_(4)(g) will be

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The molar enthalpies of combustion of C_(2)H_(2)(g), C("graphite") and H_(2)(g) are -1300,-394 , and -286 kJ mol^(-1) , respectively. The standard enthalpy of formation of C_(2)H_(2)(g) is

The enthalpy of formation of C_(2)H_(5)OH(l) , CO_(2)(g) and H_(2)O(l) are - 277.0, -393.5 and -285.5 kJ/mol respectively.Calculate the enthalpy change for the reaction: C_(2)H_(5)OH(l) + 3O_(2)(g) to 2CO_(2)(g) + 3H_(2)O(l) .

OP TANDON-Chemical Thermodynamics and Thermochemistry-Objective Question Level-A
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  2. Which of the following thermodynamic relation is correct?

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  3. The enthalpy of formation for C(2)H(4)(g), CO(2)(g) and H(2)O(l) at 25...

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  4. Identify the correct statement regarding entropy

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  5. When enthalpy and entropy change for a chemical reaction are -2.5 xx10...

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  6. One mole of an ideal gas at 300K is expanded isothermally from an init...

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  7. Latent heat of vaporisation of a liquid at 500K and 1 atm pressure is ...

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  8. The enthalpy change of a reaction does not depend on

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  9. Which plot represents for an exothermic reaction ?

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  10. Given : S((s))+(3)/(2)O(2(g))rarrSO(3(g)+2X Kcal SO(2(s))+(1)/(2)O(2...

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  11. NH(3)(g)+3Cl(2)toNCl(3)(g)+3HCl(g),DeltaH(1) N(2)(g)+3H(2)(g)to2NH(3...

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  12. The word 'standard' in standard molar enthalpy change implies

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  13. The heat of formation (DeltaH(f)^(@)) of H(2)O(l) is equal to :

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  14. The value of DeltaH and DeltaS for a reaction are respectively 30 kJ m...

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  15. The value of DeltaH^(@) for the reaction Cu^(+)(g)+I^(-)(g)toCuI(g) is...

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  16. If the enthalpy change for the reaction, CH(4)(g)+Cl(2)(g)toCH(3)Cl(...

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  17. The standard heat of formation of sodium ions in aqueous solution from...

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  18. AB,A(2) and B(2) are diatomic molecules. If the bond enthalpies of A(2...

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  19. The lattice energy of solid NaCI is 180 kcal mol^(-1). The dissolution...

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  20. Which one of the following statement is false?

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