Giveni) C(graphite)+O2(g)→ CO2(g);ΔH=xKJ/molii) C(graphite)+12O2(g)→ CO(g);ΔH=y KJ/moliii) CO(g)+12O2(g)→ CO2(g);ΔH=Z KJ/molbased on above data, find out which one of the following relationship is correct ?

C+12O2(g)→CO(g) ΔH=Y -------- (1) CO(g)+12O2(g)→CO2 ΔH=Z_-------- (2)C+O2 →CO2 ΔH=X --------- (3) from 1,2 & 3 X=Y+Z

Giveni) C(graphite)+O2(g)→ CO2(g);ΔH=xKJ/molii) C(graphite)+12O2(g)→ CO(g);ΔH=y KJ/moliii) CO(g)+12O2(g)→ CO2(g);ΔH=Z KJ/molbased on above data, find out which one of the following relationship is correct ?

C+12O2(g)→CO(g) ΔH=Y -------- (1) CO(g)+12O2(g)→CO2 ΔH=Z_-------- (2)C+O2 →CO2 ΔH=X --------- (3) from 1,2 & 3 X=Y+Z

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Given
i) $C_{(g r a p h i t e)} + O_{2 (g)} \overset{}{\to} C O_{2 (g)}; Δ H = x K J / m o l$
ii) $C_{(g r a p h i t e)} + \frac{1}{2} O_{2 (g)} \overset{}{\to} C O_{(g)}; Δ H = y K J / m o l$
iii) $C O_{(g)} + \frac{1}{2} O_{2} (g) \overset{}{\to} C O_{2 (g)}; Δ H = Z K J / m o l$
based on above data, find out which one of the following relationship is correct ?

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$x = y + z$

$z = x + y$

$y = 2 z - x$

$x = y - z$

answer is A.

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Detailed Solution

$C + \frac{1}{2} O_{2_{(g)}} \to C O_{(g)} Δ H = Y$ -------- (1)
$\underline{C O_{(g)} + \frac{1}{2} O_{2_{(g)}} \to C O_{2} Δ H = Z}$ -------- (2)
$C + O_{2} \to C O_{2} Δ H = X$ --------- (3)
from 1,2 & 3 $X = Y + Z$

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