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Which of the following equations represe...

Which of the following equations represents standard heat of combustion of `CH_(4)` ?

A

`C("diamond")+2H_(2)(g)toCH_(4)(g)`

B

`C("graphite")+2H_(2)(g)toCH_(4)(g)`

C

`C("diamond")+4H(g)toCH_(4)(g)`

D

`C("graphite")+4H(g)toCH_(4)(g)`

Text Solution

Verified by Experts

The correct Answer is:
B
Graphite is most stable state of carbon at `298 K`.
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DINESH PUBLICATION-CHEMICAL THERMODYNAMICS AND CHEMICAL ENERGETICS -Exercise
  1. The heat released when NH(4)OH and HCl neutralise is

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  2. The difference between the heats of reaction at constant pressure and ...

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  3. Which of the following equations represents standard heat of combustio...

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  4. Identify the state quantiy among the following

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  5. The DeltaH(f)^(@) for CO(2)(g), CO(g) and H(2)O(g) are -395.5,-110.5 a...

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  6. Which of the following statement is false ?

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  7. In thermodynamics, a process is called reversible when

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  8. One mole of non-ideal gas undergoes a change of state (2.0 "atm", 3.0 ...

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  9. Which of the following reactions will define DeltaH(f)^(@) ?

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  10. The enthalpy of vaporisation of a liquid is 30 kJ mol^(-1) and entropy...

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  11. Two moles of an ideal gas is expanded isothermally and reversibly from...

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  12. One mole of monoatomic ideal gas at T(K) is exapanded from 1L to 2L ad...

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  13. An ideal gas is allowed to expand both reversibly and irreversibly in ...

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  14. The standard enthalpy of formation (Delta(f)H^(@)) at 298K for methan...

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  15. (Delta H - Delta U) for the formation of carbon monoxide (CO) from its...

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  16. The enthalpy and entropy change for the reaction, Br(2)(l)+Cl(2)(g)r...

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  17. The enthalpy of hydrogenation of cyclohexene is -119.5kJ mol^(-1). If ...

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  18. The direct conversion of A to B is difficult, hence is carried out by ...

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  19. Consider the following reactions: (i) H^(+)(aq)+OH^(-)(aq)rarrH(2)O(...

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  20. Given the bond energies of H - H and Cl - Cl are 430 kJ mol^(-1) and 2...

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