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The enthalpies for the following reactio...

The enthalpies for the following reactions `(DeltaH^(Theta))` at `25^(@)C` are given below.
a. `(1)/(2)H_(2)(g) +(1)/(2)O_(2)(g) rarr OH(g)`
`DeltaH = 10.06 kcal`
b. `H_(2)(g) rarr 2H(g), DeltaH = 104.18 kcal`
c. `O_(2)(g) rarr 2O(g), DeltaH = 118.32 kcal`
Calculate the `O-H` bond energy in the hydroxyl radical.

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The ethalpies for the following reactions at 25^(@)C are given as: (1)/(2)H_(2)(g)+(1)/(2)O_(2)(g) rarr OH (g), DeltaH = 10.06 kcal H_(2)(g)rarr 2H(g),DeltaH = 104.18 kcal O_(2)(g) rarr 2O(g),DeltaH = 118.32 kcal Calculate the O-H bond enegry in the OH group.

From the following data at 25^(@)C , calculate the bond energy of O – H bond: (i) H_(2)(g) to 2H(g), Delta H_(1) = 104.2 kcal (ii) O_(2)(g) to 2O(g), DeltaH_(2) = 118.4 kcal (iii) H_(2)(g) + 1/2 O_(2)(g) to H_(2)O(g), Delta H_(3) = -57.8 k cal

Calculate in kJ for the following reaction : C(g) + O_(2)(g) rarr CO_(2)(g) Given that, H_(2)O(g) + C(g) + H_(2)(g) , Delta H = +131 kJ CO(g) + 1/2 O_(2)(g) rarr CO_(2)(g), " " Delta H = -242 kJ H_(2)(g) + 1/2 O_(2)(g) rarr H_(2)O(g), " "DeltaH = -242 kJ

H_(2)(g)+(1)/(2)O_(2)(g)rarr2H_(2)O(l), DeltaH =- 286 kJ 2H_(2)(g)+O_(2)(g)rarr2H_(2)O(l)……………kJ(+-?)

Find the heat of reaction 2Na(s) +1//2O_(2)(g) rarr Na_(2)O(s) Given: Na_(2)O(s) +H_(2)Orarr 2NaOH, DeltaH =- 56 kcal 2Na + 2H_(2)O rarr 2NaOh +H_(2),DeltaH =- 88 kcal H_(2) +1//2O_(2)rarr H_(2)O, DeltaH =- 68 kcal

Given the following data H_2(g) rarr2H(g),DeltaH=104.2kcal Cl_2 (g) rarr 2Cl(g), DeltaH = 58 kcal HCl = H(g) +Cl(g) , DeltaH = 103.2 kcal The standard enthalpy of formation of HCl(g) is

Knowledge Check

  • H_(2)(g) = 2H(g) , DeltaH = 104.2 kcal. The bond energy of H-Hbond is

    A
    104.2 kcal
    B
    208.4 kcal
    C
    52.1 kcal
    D
    Zero

  • Calculate in kJ for the following reaction : C(g) + O_(2)(g) rarr CO_(2)(g) Given that, H_(2)O(g) + C(g) + H_(2)(g) , Delta H = +131 kJ CO(g) + 1/2 O_(2)(g) rarr CO_(2)(g), " " Delta H = -242 kJ H_(2)(g) + 1/2 O_(2)(g) rarr H_(2)O(g), " "DeltaH = -242 kJ

    A
    `-393`
    B
    `+393`
    C
    `+655`
    D
    `-655`

  • Two similar reactions are given below : H_(2)(g) + (1)/(2)O_(2)(g) rarr H_(2)O(g), DeltaH = = DeltaH_(1) H_(2)(g)+(1)/(2) O_(2)(g) rarr H_(2)O(l), DeltaH= DeltaH_(2) In terms of magnitude of DeltaH ,

    A
    `DeltaH_(1) gt DeltaH_(2)`
    B
    `DeltaH_(1) lt DeltaH_(2)`
    C
    `DeltaH_(1) = DeltaH _(2)`
    D
    None of these is correct
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