Chemistry · 2013
NEET 2013 · 18 May · Code Y · Q139
Three thermochemical equations are given below: (i) C_(graphite) + O_2( g ) → CO_2( g ); Δ_r H^°=x kJ mol^-1 (ii) C_(graphite) +1/2 O_2( g ) → CO ( g…
Three thermochemical equations are given below :
(i)
$\displaystyle \mathrm{C}_{\text {(graphite) }}+\mathrm{O}_2(\mathrm{~g}) \rightarrow \mathrm{CO}_2(\mathrm{~g}) ; \Delta_{\mathrm{r}} \mathrm{H}^{\circ}=x \mathrm{~kJ} \mathrm{~mol}^{-1}$
(ii)
$\displaystyle \mathrm{C}_{\text {(graphite) }}+\frac{1}{2} \mathrm{O}_2(\mathrm{~g}) \rightarrow \mathrm{CO}(\mathrm{g}) ; \Delta_{\mathrm{r}} \mathrm{H}^{\circ}=y \mathrm{~kJ} \mathrm{~mol}^{-1}$
(iii)
$\displaystyle \mathrm{CO}(\mathrm{g})+\frac{1}{2} \mathrm{O}_2(\mathrm{~g}) \rightarrow \mathrm{CO}_2(\mathrm{~g}) ; \Delta_{\mathrm{r}} \mathrm{H}^{\circ}=z \mathrm{~kJ} \mathrm{~mol}^{-1}$
Based on the above equations, find out which of the relationship given below is correct :
Official answer
(4)
$\displaystyle x=y+z$
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NEET (UG) 2013 Chemistry question, with the answer from NTA’s final answer key. Where our answers come from.