Considerthe following reactions-I- Cs - 12 O2g - COg - - H1 - aII- COg - 12O2g - CO2g- - H2-bIII- Cs - CO2g - 2COg- - H3-cSelect the correct statement

The correct option is A Heat of foramtion of CO_2 is (a+b) C_(s)+12O_2(g)⟶ CO_(g); H_1=a⟶ (1) C_(g)+12O_2(g)⟶ CO_2(g); H_2=b⟶ (2) ...

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Heat of Formation

Considerthe f...

Question

Considerthe following reactions,
I. $C (s) + \frac{1}{2} O_{2} (g) \to C O (g); Δ H_{1} = a$
II. $C O (g) + \frac{1}{2} O_{2} (g) \to C O_{2} (g); Δ H_{2} = b$
III. $C (s) + C O_{2} (g) \to 2 C O (g); Δ H_{3} = c$
Select the correct statement

Heat of foramtion of

C O_{2}

(a + b)

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Heat of combination of

C

(a + b)

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Δ H_{3} = Δ H_{3} - Δ H_{2}

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All the above are correct statements

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Δ H_{c o m b} C

I

C (s) + O_{2} (g) ⟶ C O_{2} (g)

I I

C (s) + \frac{1}{2} O_{2} (g) ⟶ C O (g)

I I I

C O (g) + \frac{1}{2} O_{2} (g) ⟶ C O_{2} (g)

Determine $Δ U^{\circ}$ at 300 K for the following reaction using the listed enthalpies of reaction.

$4 C O (g) + 8 H_{2} (g) \to 3 C H_{4} (g) + C O_{2} (g) + 2 H_{2} O (l)$

$C (g r a p h i t e) + \frac{1}{2} O_{2} (g) \to C O (g); Δ {H_{1}}^{\circ} = - 110.5 k J$

$C O (g) + \frac{1}{2} O_{2} (g) \to C O_{2} (g); Δ {H_{2}}^{\circ} = - 282.9 k J$

$H_{2} (g) + \frac{1}{2} O_{2} (g) \to H_{2} O (l); Δ H_{3}^{0} = - 285.8 k J$

$C (g r a p h i t e) + 2 H_{2} (g) \to C H_{4} (g); Δ H_{4}^{0} = - 74.8 k J$

C (s) + O_{2} (g) \to C O_{2} (g), Δ H = + 94.0 K c a l .

C O (g) + \frac{1}{2} O_{2} (g) \to C O_{2} (g), Δ H = - 67.7 K c a l .

^{- 1}

C (s) + \frac{1}{2} O_{2} (g) \to C O (g)

C (s) + O_{2} (g) ⟶ {C O}_{2} (g) + x k J

C O (g) + \frac{1}{2} O_{2} (g) ⟶ {C O}_{2} (g) + y k J

C O (g)

O_{(g)} + e^{-} \to O_{(g)}^{-}, Δ H_{1}

F_{(g)} + e^{-} \to F_{(g)}^{-}, Δ H_{2}

C l_{(g)} + e^{-} \to C l_{(g)}^{-}, Δ H_{3}

O_{(g)}^{-} + e^{-} \to O_{(g)}^{2 -}, Δ H_{4}

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