Determine magnitude of the heat of transformation of Cdiamond- Cgraphite in kcal from the following data-Cdiomond - O2 g - CO2 g -i - H - - 94-5 kcalCgraphite - O2 g - CO2 g-ii - H - - 94-0 kcal

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Heat of Reaction

Determine mag...

Question

Determine magnitude of the heat of transformation of $C_{d i a m o n d} \to C_{(g r a p h i t e)}$ $(i n k c a l)$ from the following data:
$C_{(d i o m o n d)} + O_{2} (g) \to C O_{2} (g) . . . (i) (Δ H = - 94.5 k c a l) C_{(g r a p h i t e)} + O_{2} (g) \to C O_{2} (g) . . . (i i) (Δ H = - 94.0 k c a l)$

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C_{(d i a m o n d)} + O_{2} (g) \to C O_{2} (g) △ H = - 94.5 K c a l

C_{(g r a p h i t e)} + O_{2} (g) \to C O_{2} (g) △ H = - 94.0 K c a l

C_{(d i a m o n d)} \to C_{(g r a p h i t e)}

C_{(d i a m o n d)} + O_{2} (g) \to C {C O}_{2} (g); (Δ H = - 94.5 k c a l)

C_{(g r a p h i t e)} + O_{2} (g) \to C {C O}_{2} (g); (Δ H = - 94.0 k c a l)

Calculate $Δ H$ for $C_{(g r a p h i t e)} \to C_{d i a m o n d}$ from the following data:

i) $C (g r a p h i t e) + O_{2} \to C O_{2} (g), Δ H = - 94 K c a l$

ii) $C (d i a m o n d) + O_{2} \to C O_{2} (g), Δ H = - 68 K c a l$

Δ H

C (g r a p h i t e) \to C (d i a m o n d)

C (g r a p h i t e) + O_{2} (g) ⟶ C O_{2} (g); Δ H^{o} = - 393.5 k J

C (g r a p h i t e) + O_{2} (g) ⟶ C O_{2} (g); Δ H^{o} = - 395.4 k J

Assertion- $C (g r a p h i t e) + O_{2 (g)} \to C O_{2 (g)}$ ,

$Δ H = - 393.5 k . J$

$C (d i a m o n d) + O_{2 (g)} \to C O_{2 (g)}$ ,

$Δ H = - 395.4 k . J$

Reason(R): graphite is more stable than diamond, so heat of combustion is less.

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