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The enthalpy change for chemical reactio...

The enthalpy change for chemical reaction is denoted aas `DeltaH^(Theta)` and `DeltaH^(Theta) = H_(P)^(Theta) - H_(R)^(Theta)`. The relation between enthalpy and internal enegry is expressed by equation:
`DeltaH = DeltaU +DeltanRT`
where `DeltaU =` change in internal enegry `Deltan =` change in number of moles, `R =` gas constant.
Enthalpy of the system is given as

A

`H + PV`

B

`U +PV`

C

`U - PV`

D

`H -PV`

Text Solution

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`H = U +PV`
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The enthalpy change for chemical reaction is denoted aas DeltaH^(Theta) and DeltaH^(Theta) = H_(P)^(Theta) - H_(R)^(Theta) . The relation between enthalpy and internal enegry is expressed by equation: DeltaH = DeltaU +DeltanRT where DeltaU = change in internal enegry Deltan = change in number of moles, R = gas constant. Which of the following equations corresponds to the definition of enthalpy of formation at 298K ?

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CENGAGE CHEMISTRY-THERMODYNAMICS-Exercises (Single Correct)
  1. The word 'standard' in standard molar enthalpy change implies

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  2. For which of the following equations, will DeltaH be equal to DeltaU?

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  3. The enthalpy change for chemical reaction is denoted aas DeltaH^(Theta...

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  4. Enthalpy chane of a reaction with be equal to

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  5. The molar enthalpies of combustion of C(2)H(2)(g), C("graphite") and H...

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  6. The relationship between enthalpy and internal energy change is

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  7. The equilibrium state is attained when the reversible reaction is carr...

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  8. The relationship between the free energy change (DeltaG) and entropy c...

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  9. For the gaseous reaction involving the complete combustion of isobutan...

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  10. Entropy of system depends upon

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  11. For the gaseous reaction: N(2)O(4) rarr 2NO(2)

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  12. For the reversible process, the value of DeltaS is given by the expres...

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  13. For a process H(2)O(s) rarr H(2)O(l) at 273 K

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  14. i. At absolute zero the entropy of a perfect crystal is zero. This sta...

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  15. In which of the following process DeltaH and DeltaU are of same magnit...

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  16. Enerrgy can transfter from syetm to surroundings as work if

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  17. The state of equilibrium refers to

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

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  19. If values of Delta(f)H^(Theta) of ICI(g),CI(g), and I(g) are, respecti...

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

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