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Since the enthalpy of elements in their ...

Since the enthalpy of elements in their natural state is taken to be zero, the heat of formation `(Delta_(f)H)` of compounds

A

Is always negative

B

Is always positive

C

May be negative or positive

D

Is zero

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CENGAGE CHEMISTRY ENGLISH-THERMODYNAMICS-Exercises (Single Correct)
  1. In which of the following process DeltaH and DeltaU are of same magnit...

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  2. Energy can transfer from system to surroundings as work if

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  3. The state of equilibrium refers to

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  4. For hypothetical reversible reaction 1//2A(2)(g) +3//2B(2)(g) rarr A...

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  5. If values of Delta(f)H^(Theta) of ICl(g),Cl(g), and I(g) are, respecti...

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  6. If S+O(2)toSO(2),DeltaH=-298.2 " kJ" " mole"^(-1) SO(2)+(1)/(2)O(2)t...

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  7. Under which of the following condition is the relation DeltaH = DeltaU...

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  8. Evaporation of water is

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  9. Which of the following reaction is endothermic?

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  10. Which of the following is an endothermic reaction?

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  11. Calculate heat of formation of KOH(s) using the following equations ...

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  12. Since the enthalpy of elements in their natural state is taken to be z...

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  13. A reaction A +B rarr C+D +q is found to have a positive entropy change...

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  14. Molar heat capacity of water in equilibrium with the ice at constant p...

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  15. Standard molar enthalpy of formation of CO(2) is equal to :

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  16. A process is called reversible when

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  17. Which one of the following statements is false?

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  18. Identify intensive property from the following

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  19. The product of combustion of an aliphatic thiol (RSH) at 298K are :

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  20. For an endothermic reaction, Delta H represents the enthalpy of the re...

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