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If enthalpies of formation of C(2)H(4)(g...

If enthalpies of formation of `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 , the enthalpy of combustion of ethane is equal to

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If enthalpies of formation of C_(2)H_(4)(g)1 ,CO_(2) 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

At 300K , the standard enthalpies of formation of C_(6)H_(5)COOH_((s),CO_(2(g)) and H_(2)O_((l)) are -408,-393 and -286kJ mol^(-1) respectively. Calculate the heat of combustion of benzoic acid at (i) constant pressure, (ii) constant volume. (R=8.31J mol^(-1)K^(-1))

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

If the enthalpies of formation of C_3H_8(g), CO_2(g) and H_2O(l) at standard conditions are -104 kJ mol^-1, -394 kJ mol^-1 and -286 kJ mol^-1 respectively then the standard Enthalpy of combustion of 66 g of C_3H_8(g) will be

The enthalpies of formation of CO2(g),H2O(l) and C2H4(g) ​ are respectively −393.5,−286 and +52.3kJmol −1 . The enthalpy change for the combustion of C2H4(g) ​ is ?

Standard enthalpy of formation of C_(3)H_(7)NO_(2)(s),CO_(2)(g) and H_(2)O(l) are 133.57,-94.05 and -68.32kcal mo1^(-1) respectively Standard enthalpy combustion of CH_(4) at 25^(@)C is -212.8 kcal mo1^(-1) Calculate DeltaH^(Theta) for the reaction: 2CH_(4)+CO_(2)+1//2N_(2)rarrC_(3)H_(7)NO_(2)(s)+1//2H_(2) Calculate DeltaU for combustion of C_(3)H_(7)NO_(2)(s) .

Standard enthalpy of formation of C_(3)H_(7)NO_(2)(s),CO_(2)(g) and H_(2)O(l) are 133.57,-94.05 and -68.32kcal mo1^(-1) respectively Standard enthalpy combustion of CH_(4) at 25^(@)C is -212.8 kcal mo1^(-1) Calculate DeltaH^(Theta) for the reaction: 2CH_(4)+CO_(2)+1//2N_(2)rarrC_(3)H_(7)NO_(2)(s)+1//2H_(2) Calculate DeltaU for combustion of C_(3)H_(7)NO_(2)(s) .

From the following data, calculate the enthalpy change for the combustion of cyclopropane at 298K . The enthalpy of formation of CO_(2(g)),H_(2)O_((l)) and Propen e_((g)) are -393,-285.8 and 20.42 kJ mol^(-1) respectively. The enthalpy of isomerisation of cyclopropane to propene is -33.0kJ mol^(-1)

In a fuel cell methanol is used as fuel and oxygen gas is used as an oxidizer. The reaction is : CH_(3)OH_((l))+(3)/(2)O_(2(g))rarr CO_2((g))+2H_(2)O_((l)) At 298K standard Gibb's energies of formation for CH_(3)OH(l), H_(2)O(l) and CO_(2)(g) are -166.2,-237.2 and -394.4kJ mol^(-1) respectively. If standard enthalpy of combustion of methanol is -726kJ mol^(-1) , efficiency of the fuel cell will be :

In a fuel cell methanol is used as fuel and oxygen gas is used as an oxidizer. The reaction is : CH_(3)OH_((l))+(3)/(2)O_(2(g))rarr CO_2((g))+2H_(2)O_((l)) At 298K standard Gibb's energies of formation for CH_(3)OH(l), H_(2)O(l) and CO_(2)(g) are -166.2,-237.2 and -394.4kJ mol^(-1) respectively. If standard enthalpy of combustion of methanol is -726kJ mol^(-1) , efficiency of the fuel cell will be :

VMC MODULES ENGLISH-THERMODYNAMICS & THERMOCHEMISTRY-Enable
  1. The enthalpy change of a reaction does not depend upon

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  2. Which of the following expression represents, the first law of thermod...

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  3. The dependence of Gibbs free energy on pressure for an isothermal proc...

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  4. For a reaction to occur spontaneously

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  5. If enthalpies of formation of C(2)H(4)(g),CO(2)(g) and H(2)O(l) at 25^...

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  6. For an ideal diatomic gas:

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  7. When a solid changes into liquid, the entropy

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  8. In which of the following entropy increases?

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  9. For an exothermic reaction

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  10. The enthalpy change for the transition of liquid water to steam, Delta...

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  11. In the combustion of 2.0 g of methane 25 kcal heat is liberated, heat ...

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  12. The combustion reaction occuring in an automobile is 2C(8)H(18)+25O(2)...

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  13. At constant TandP,Which of the following statements is correct for the...

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  14. The heat of formations of CO((g)) and CO(2(g)) are -26.4 kcal and -94....

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  15. The value of heat generated when 36.5 gm of HCI and 40 gm of NaOH reac...

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

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  17. The heat of formation is the change in enthalpy accompanying the forma...

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  18. An isolated system is that system in which

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  19. Which of the following statement is true regarding the entropy of the ...

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  20. In a reversible isothermal process, the change in internal energy is :

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